Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca4b1292285463d…

MALICIOUS

PDF

69.3 KB Created: 2020-12-06 19:08:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a10d8e9dd2f2ca4eca4233703729024f SHA-1: 0be1c2e541dd65e48ec82117b2d3ff9dc90e2282 SHA-256: cca4b1292285463dfc59341b5ccd1030ff7b7ba65ee443ca71a28296cdb830ca
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojanized document. It contains numerous external links, including one pointing to 'trafffe.ru', suggesting a link farm or redirection to a malicious site. The document body, though heavily obfuscated, contains text related to a 'millionaire fastlane' PDF download, which is a common lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://trafffe.ru/strik?utm_term=the+millionaire+fastlane+full+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5f8908fe27e3a.pdfIn PDF document text
    • https://wijizavop.weebly.com/uploads/1/3/4/3/134309393/429205.pdfIn PDF document text
    • https://zulewawasukuxu.weebly.com/uploads/1/3/4/5/134581955/rivizuzovosepes-pibojobijesunin-zizeke-gugerojuxumopo.pdfIn PDF document text
    • https://buvudipugumop.weebly.com/uploads/1/3/4/8/134876529/zaworizirafefusu.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/zulumudalenidotitugi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385880/normal_5f9162afd3d63.pdfIn PDF document text
    • https://tajamopem.weebly.com/uploads/1/3/4/7/134745730/6ef5f1.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/5fc6731a8787e8798992012f/t/5fc983a0ec1d586fb382dd97/1607041952593/neighbourhood_crossword_clue_10_letters.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc545c33dfdd95b60f1f620/t/5fc84cd2f97c193540eb0971/1606962386585/46182574045.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc529e012facd59cec8ad00/t/5fcc2f69d235d37878b74477/1607217001909/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29a562e8-5e93-4a47-96d5-8aef1fade4d8/teaching_emotional_intelligence_in_schools.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6899cc6d96458364908ac/t/5fc76d8e788a962b7c2f88c3/1606905242118/13820122854.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_off0000cce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE9 5324 bytes
SHA-256: dfbfba7d746ed8aa4d5d3660f90e54eb98839edc50538736e7ea666ee4943895
font_01_sfnt_off0000dee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE7 12852 bytes
SHA-256: 6259460e9651956aea6656e65c6520f78e5c047cd96772e3721c1743e85b4f57

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