Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d4148fb99aa7a7…

MALICIOUS

PDF

83.9 KB Created: 2021-09-02 06:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 83e6d81e913f8698e2e61ed3a9cf3a53 SHA-1: ee59d1e4b81e6c9deb412a81a48603735389ba66 SHA-256: 94d4148fb99aa7a73da83ab415a1e0ce9e47b03c6e534ade32e39f92c7b31acc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to host and distribute malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with a phishing lure that aims to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/m5ni5ahq4rmbvaa9btn4169455/9122363770.pdf In PDF document text
    • http://freeski.hu/freeski/file/rokovepovedanuziwo.pdfIn PDF document text
    • http://richfield1962.com/clients/4/47/47516dc9824f3897220912ef171c404f/File/77530547892.pdfIn PDF document text
    • http://www.neocota.com/fckimages/file/razazitifewin.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/2424d453bbc8ea1d592c19a28f681be0/ruwejamufosogutol.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/a7ddc286585de8e2ebaf2d85f2db3486/24107825013.pdfIn PDF document text
    • https://rosettes.it/userfiles/file/7169852422.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/21566279622.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/92585442448.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/35ql946jdbr96lpn0flr0at3h4/komopok.pdfIn PDF document text
    • https://xehowo24h.com/images/ckeditor/files/rupuregixamogorimej.pdfIn PDF document text
    • http://magnumprint.ru/upload/files/26884626624.pdfIn PDF document text
    • https://reklama71.ru/upload_picture/xuzafozinaga.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de3ea8f4f7---98209410259.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/29150042100.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4fe2384e3---sirajusetetojatejadofowes.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ab5fcf0f2---bagagidi.pdfIn PDF document text
    • http://cabanagarden.hu/editor_up/kuvek.pdfIn PDF document text
    • http://klpa.net/userData/board/file/749497248.pdfIn PDF document text
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/vuwosebelemugajeli.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607de527c0dae---69328495408.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/30615460912.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/u1drmnfcg5heoutfhsm55qeu4l/43103293681.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+get+granny+mods+on+iphonePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C3 17900 bytes
SHA-256: ff07039d686bebf5c48467b434f5c3529b406641e3ed843611eceeedb2a0f256
font_01_sfnt_off00010f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F81 10984 bytes
SHA-256: 648084c0d77139c5e9c1923bf2fb855935d71d1b6c79692b81f8a0d8f07d992a
font_02_sfnt_off000128a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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