Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7d54a7e78e8880…

MALICIOUS

PDF

75.2 KB Created: 2021-04-06 21:16:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d655987b3e377f1ea274eb39f3c20a4e SHA-1: 347097cc47335b9001279b7b7151a6a983d20526 SHA-256: 9d7d54a7e78e8880f8219048b85bb9a69365725d1de1c8cb8b0230320a27021f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 https://xezojetit.ru/award?keyword=7+day+ketogenic+diet+plan+pdf+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489725/normal_605cb03f1fee9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491687/normal_6056a53095a48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481540/normal_6065169ebc159.pdfIn PDF document text
    • https://minojesifivu.weebly.com/uploads/1/3/4/8/134860027/5686448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455673/normal_604cb5bd2409e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383680/normal_6048e48adc6d8.pdfIn PDF document text
    • https://gakujoxabusu.weebly.com/uploads/1/3/5/3/135394689/tabemewadus_jotoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_9dbf96ecb1484cdc84574f2bff56c2eb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/resebojekib.pdfIn PDF document text
    • http://xepumobokuv.rf.gd/kenmore_elite_oasis_he_washer_guide.pdfIn PDF document text
    • http://gekabogaramal.rf.gd/50569418690.pdfIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_45cf5ab43a0040ffbda9e29c82ccd1df.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/45265279817.pdfIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_eb27d97ffdd84a0494ff0e37ac977930.pdf?index=trueIn PDF document text
    • http://gekazez.epizy.com/friend_like_me_drum_sheet_music.pdfIn PDF document text
    • https://beea745c-e446-4317-9ad8-fe501d584c0a.filesusr.com/ugd/9196db_bdcd35710bd1475bafcf224b31cafd57.pdf?index=trueIn PDF document text
    • https://7b9449e5-51e9-4a7e-81f5-8587c42320f9.filesusr.com/ugd/571bad_041e998679134c469a9caf4420b822b8.pdf?index=trueIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_b5860bcaface46a4902226d46a1797f9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/snapchat_app_for_java.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE737 5296 bytes
SHA-256: 5e155df58c59481ce30d1a0ffa00a4d8597dc11c4e003fe844e6e4c6d0bdbcee
font_01_sfnt_off0000f967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF967 10700 bytes
SHA-256: 8b37e3a0b8f164193427d902772faa7bc6e944c5324a82c0f6f0d34ba00ac0cf

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