Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d7fd5ff0217345…

MALICIOUS

PDF

97.4 KB Created: 2021-07-06 23:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: db594d038512db26a1761f858fdf6ce0 SHA-1: 8d8d8d92ed33b647946b0640ea789b046b4bf28c SHA-256: d9d7fd5ff021734513f63635e8747e2c5674fa5b882c58ebe14243f06d3df40d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document, potentially leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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 https://smidgel.ru/uplcv?utm_term=how+do+sea+turtles+help+the+environment PDF link annotation
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/tc0492m99aop43rdj4tp4nrb02/14932932962.pdfIn PDF document text
    • http://yongqingtech.com/d/files/12369447741.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/zimunasodexesuribura.pdfIn PDF document text
    • http://ski-experience-japan.com/images/blog//file/fovitigemuximiw.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607a574bb9996---34619641166.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/h3otbmtqo3c00sa1hfeeeh5d26/nekepezixoduforaz.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdb872369a---josubutetujinolememutug.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/592140a02c329a076e92b81f8f55a00b/21699430021.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609492fd681b4---65676626352.pdfIn PDF document text
    • http://fly.no1-yes.com/userfiles/file/lobuvegujakaf.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/13863654756.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/bibgr9kqj52olecjs5jkd11v1q/86956358230.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/54488545220.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/73acc4f63d99769cb524b13342dfb70a/xepepovefexoxupopotaza.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/dutejawex.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/zakaxusoxawozejejovi.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983638ac815---wiketabowesovududora.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/42930922561.pdfIn PDF document text
    • http://espressoperfetto.nl/app/webroot/files/userfiles/files/jopuvetopeloxu.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aace0813cf1---jopomokod.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/16514857856.pdfIn PDF document text
    • http://kcde.kr/userfiles/file/35592205124.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/74578655984.pdfIn PDF document text
    • https://cmoretv.com/userfiles/jobonexadisalexuzubozuzus.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB6 20076 bytes
SHA-256: 58d93228561f816e5aede4cf96d7b8affc0fb90d63bdeab5483eda6108793253
font_01_sfnt_off00013154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13154 10900 bytes
SHA-256: 94fa46d8200c609f3e98a81d0253835a49d60a45072153c0bb273dbef4905352
font_02_sfnt_off00014a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00016270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16270 16060 bytes
SHA-256: 7e09a3551a5f95464d485b0302bb2ea5a0fc1ccd586ad0b46555f182e6907fed

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