Malicious PDF — malware analysis report

Static analysis result for SHA-256 af580030b66e5731…

MALICIOUS

PDF

370.0 KB Created: 2020-12-17 16:04:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 38b4539ef374343de7d287b436e3adf3 SHA-1: 14aa8c2f82ebe4d1c05e8f3a4fcf0be572b92384 SHA-256: af580030b66e57314188dcd30c517e534012111c649dbba96d39d489d6757c53
202 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically `https://traffmen.ru/aws?utm_term=blood+transfusion+guidelines+in+pediatrics`. This, combined with the 'urgency lure' heuristic and ClamAV detection, strongly suggests a phishing or malware delivery attempt. The ML classifier also flagged this PDF with a high probability of being malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffmen.ru/aws?utm_term=blood+transfusion+guidelines+in+pediatrics In PDF document text
    • https://fagozozefixus.weebly.com/uploads/1/3/4/8/134846406/rabuforinobogo-gisiresoma-xapegibavumifi-wexegedora.pdfIn PDF document text
    • https://nafogoke.weebly.com/uploads/1/3/4/7/134776139/6343021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_5f8b0dea9a178.pdfIn PDF document text
    • https://gijepeparo.weebly.com/uploads/1/3/4/3/134318767/jifeno-jebel-gelixemokete-xerewurezi.pdfIn PDF document text
    • https://tomovomat.weebly.com/uploads/1/3/4/6/134617768/tinadixafojogem-katozevivuvaz-gukanagojisob-tubojog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0baae3dfdd95b60d439b1/t/5fc175016457125654731eb8/1606513922931/dubamofalopovifenodizi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29d8640f1034a5cb3e639/t/5fc4e2fc3c02f22b9da621b0/1606738685486/87072083872.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc16edbc30a162e0c564289/t/5fca82b8a08b9342fa9d65f6/1607107257171/jeparaxeperenasotufifazol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79625cb936d6a06aa469d/t/5fc7fd928d63b2768a437573/1606942098781/67657118173.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd2e708b31625a26bcc62b/1606233713285/homescapes_apk_mod.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce83b06ea0cf7c4ed1ee97/t/5fd679da5b1f6f7539dadfb6/1607891418985/69441568459.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3703b8ef7301f8b20f9e5/t/5fc8f7c210e31a3b30d83f17/1607006146403/xesebilu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54ae52cf09257bd88a4a3/t/5fc963c419890c408b1c4a03/1607033807607/5381989590.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://scripts.sil.org/OFLIn 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_off00055815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55815 5372 bytes
SHA-256: 95dc9094d65c78d75dac7d1a2aabcac228714036e0eee6625c06c99765c984f3
font_01_sfnt_off00056a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56A6C 25788 bytes
SHA-256: 002a051e655e04cb034bec0b8d44c9a1703dd160943ea312a8fb2143258785cc
font_02_sfnt_off0005a45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A45A 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953