Malicious PDF — malware analysis report

Static analysis result for SHA-256 2223854dab9bfa5d…

MALICIOUS

PDF

175.0 KB Created: 2021-06-25 22:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f5c0eec5c0c08c10007e52f2b5e4d490 SHA-1: d99aa499e9b872df8279430d124fc1364c656c20 SHA-256: 2223854dab9bfa5d768a08c9c2972d8aebd1441e95bc9520eb91da1bf2194409
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised CMS upload directories, suggesting a link farm designed to host malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8457

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703b4904fbf---lekozi.pdf In PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4da35e7fb3---wifed.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0ddc3cc09---40447039853.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f5758f5be---dovixemab.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/37595224626.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1996696a9---deliribemerutoboleko.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097380865380---84561538763.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/zusigefafinur.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4ed13b0ae---mejupafituradeter.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609625d9c4201---sijum.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a078e1dc2---dafipaludazesuduxobaveve.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/retobefus.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b851493ab9c---leritigid.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0e59d8c8d---66362897414.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff5ddc97e0---32991774595.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d0f64812a---devapisetudaxutiba.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/48557744104.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/690e73d4ec245635a1695ff5d3ac215c/1734931197.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16073f298df2c4---46794792775.pdfIn PDF document text
    • http://whs1979.net/clients/65916/File/jofagukuz.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/repukin.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/7be857bf423b5bc6afe5614c156058c2/73427863871.pdfIn PDF document text
    • http://busanpc1.com/upload/fckeditor/file/sesezixadilila.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f419e102f4---xizifumeviludabe.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/8ebd52e9f59980f7c94ece6026abd02b/56591212812.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/iuecta5ucso2ht0tft1u2uacv6/69061053908.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/kozepipux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+make+your+builds+look+different+in+fortnite+on+ps4PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22E06 17680 bytes
SHA-256: a274749fbc705e922de3e0db91f0e6ae5f86467567f23a9c695995ef35f27c73
font_01_sfnt_off00025cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25CAD 11260 bytes
SHA-256: 5cbab0b88486d72ad7b9f4204f283ed30ebb17f63fe167ef18268d7d9b717b92
font_02_sfnt_off000276e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x276E2 1732 bytes
SHA-256: 5b3c947262022625ef2d4cfb2d0fa10a94f23c97611fd4c7364bfcc62a76ce6a
font_03_sfnt_off00027f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27F11 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_04_sfnt_off00029456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29456 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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