Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29f419459a31682…

MALICIOUS

PDF

70.8 KB Created: 2021-06-05 08:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce2c15baf7a872898e84bb49e731ea2e SHA-1: 77295ab4988db86335261aecc5754a51f8f1f36a SHA-256: d29f419459a3168243c861f5103729e195e894594db0dbab973d7c889bbfac1f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. The document contains a large number of external links, suggesting it's part of a link farm or phishing operation. The embedded content, though heavily obfuscated, appears to be related to a summary of 'Pride and Prejudice' chapters, likely a lure to direct users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/pbw?utm_term=pride+and+prejudice+chapters+11-16+summary
    • https://static.s123-cdn-static.com/uploads/4445736/normal_5ff19b2f1f682.pdf
    • https://cdn-cms.f-static.net/uploads/4426073/normal_606915d7e311b.pdf
    • https://cdn-cms.f-static.net/uploads/4474759/normal_60152a9d26154.pdf
    • https://cdn-cms.f-static.net/uploads/4467915/normal_605f78e0e8380.pdf
    • https://tokugariwonudaz.weebly.com/uploads/1/3/4/3/134316825/vorime.pdf
    • https://cdn-cms.f-static.net/uploads/4485016/normal_602b2b1755680.pdf
    • https://nabujoxosujegim.weebly.com/uploads/1/3/5/9/135958809/loteta.pdf
    • https://cdn-cms.f-static.net/uploads/4447098/normal_603a67a852215.pdf
    • https://cdn-cms.f-static.net/uploads/4486215/normal_603225e38f4fb.pdf
    • https://cdn-cms.f-static.net/uploads/4412158/normal_6045fe3cb75c9.pdf
    • https://cdn-cms.f-static.net/uploads/4405950/normal_6057f891b7370.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://namikikis.pbworks.com/f/60505905624.pdf
    • https://uploads.strikinglycdn.com/files/a897800a-2b99-4539-bf71-958c1692f73a/activate_key_freemake_video_converter_4.1.10.pdf
    • https://uploads.strikinglycdn.com/files/a273fde3-d291-4fd8-8f04-3051623d927d/lugebetirexupeluvotila.pdf
    • https://uploads.strikinglycdn.com/files/ffa1359a-c7e9-4b2f-ae98-3330c514836f/examen_lainitas_primer_grado_tercer_bimestre_gratis.pdf
    • https://uploads.strikinglycdn.com/files/e174edbb-7097-4cdb-a3f2-c9922cac0db9/how_do_you_describe_stars.pdf
    • http://jesababa.pbworks.com/w/file/fetch/144415806/convergent_vs_divergent_thinking_reddit.pdf
    • https://uploads.strikinglycdn.com/files/30f0e9cb-a86d-45a6-83b9-303f9fe5e1f1/ripobijet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9cc.bin
2553d2b221cdeba55f0fdf6b9d64081fd8746eec6723c36eb9d341c26c44de4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CC 5696 bytes
font_01_sfnt_off0000ed1c.bin
4c8bd1a175910eff6b757b55ede03a45a47dd866d9a4828973ff77d9a543f02b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED1C 9676 bytes

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