Malicious PDF — malware analysis report

Static analysis result for SHA-256 9985617a7c4a5404…

MALICIOUS

PDF

81.1 KB Created: 2021-08-17 04:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5e0fa51826b6ff784e9e7a9a0a2bcb7c SHA-1: 8885334a7ac9b260a90b68b1d4b8832a0bb30557 SHA-256: 9985617a7c4a5404ebedc42c90f8d9024e6004329f1c4eb36e716d1cf0fcf2d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, providing no direct content clues, but the overall structure strongly implies a malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd95c697350---gafojer.pdf In PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1dd836ef0---11026809937.pdfIn PDF document text
    • http://badgerhillfarm.uk/601431725.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/gk178vsptvlr4iusodr064ha24/larobutuwavabo.pdfIn PDF document text
    • http://davcpundri.com/css/file/wamitapovajiti.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/39tnmm055annba7ns5p1ff57q4/47617275179.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c9c321fbf---bosoxozififepozenikezunum.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/nosuzoxinixizoropud.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/bapexovexijinepitu.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/19448142533.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c5a084923---xibibatefogejadibizit.pdfIn PDF document text
    • http://khaskhaan.mn/uploads/userfiles/files/dobitezokojunobekamiwemeb.pdfIn PDF document text
    • https://kaisar168.com/contents//files/10066362107.pdfIn PDF document text
    • http://raegcafe.com/uploads/files/wibutanarerewidipo.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/70378059725.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1608406e805cfa---17912195901.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/3493c9fa34323aabf607cb9ad4c856dc/78447785750.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/manuvuwasoparepinegoritov.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/1b1a1c42389148ff41c1151c6cc84a7e/93884733423.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/r7n30def0o23tpnd4lsjlh0osq/wopafalakarivudunakajaset.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/gudarapaxomigi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=objective+agriculture+by+s+r+kantwa+pdf+free+downloadPDF 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_off0000d6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF7 17040 bytes
SHA-256: 30c58f8a43fc075b11d16362b2d61a87678b41a4e91123c7171c1b166175ecfc
font_02_sfnt_off00011b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B70 11548 bytes
SHA-256: 32f80bdca7550cb30f2d1247b7668b2e9fe0b142fe68d85beb55f6b25fef69f9

Open this report in the interactive analyzer, or submit your own file for analysis.