Malicious PDF — malware analysis report

Static analysis result for SHA-256 61d965239a76fecb…

MALICIOUS

PDF

60.3 KB Created: 2020-12-16 22:28:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0e46bcb977b43f7cc85652fde9a1c43c SHA-1: fb6b045e3c4fd9639fe2deb4872d9b70ff55349d SHA-256: 61d965239a76fecbc0ac0c5c6aba4dab790a2761aedea342bb544ed1b51971d5
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or malware distribution attempt. It contains a large number of links, including one pointing to known malicious redirector infrastructure at `traffmen.ru`. The document body is heavily obfuscated, but the presence of numerous external links suggests a link farm or redirection strategy to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=the+mixed-up+chameleon+ebook In PDF document text
    • https://cdn-cms.f-static.net/uploads/4419851/normal_5fb80da57fdd9.pdfIn PDF document text
    • https://fepaxumezo.weebly.com/uploads/1/3/4/3/134320712/sipawesajena-wumivupoban-vabubegeta-fapawubezetot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496582/normal_5fd31622c8573.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6a843bb-7306-4105-8615-11ad8ce5d8c7/the_wonderful_wizard_of_oz.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/66384697430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b25811cd-e2e5-436e-9fa2-3767d3b4f268/osmosis_gizmo_quiz_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb27b64c-948d-4f01-a1f5-629c065a9e65/pateluberafewol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fced41fd131352a6a8a585e/t/5fd6267589566e781f47e0b2/1607870069976/teatv_apk_app.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/79360725231.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5498fa04221c71173fe4/1606374558110/osrs_piscarilius_favor_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce13338-1eca-4e7b-961e-256b6a942bf5/ruwanevegigulovotozuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a8ee467-b53d-4a7c-b683-f422b3927677/kibinopolofikilixaberu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e0c3cae-7b32-47fe-a0e6-c58422922609/98798505732.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aeee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEEE 5292 bytes
SHA-256: a739a5d296eb0c2bd11b91c0cb00b69b42d3a7312eea2a30af0a554d1acc1e85
font_01_sfnt_off0000c0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0CB 11348 bytes
SHA-256: b9451eb435055caa8b34285dae04ed5b7abbaac07a559e54702f833ae7d034f5

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