Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4276fcafcbeb2a…

MALICIOUS

PDF

38.6 KB Created: 2020-11-08 02:56:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2cfbdace01c1e628506fe9f14382c5e9 SHA-1: cb8ce7bdcbe2dbbe90c4d876a9ae6152a2203ff0 SHA-256: 0d4276fcafcbeb2a422cf18d8613f85f1a67b020ad9468ebf546e8bda78f6fca
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, characteristic of a link farm or SEO spam. One of the embedded links, 'https://traffine.ru/aws?keyword=siemens+dca+vantage+analyzer+manual', is suspicious. The ML classifier also flagged this PDF as malicious with high confidence. The presence of multiple external links suggests an attempt to direct users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://traffine.ru/aws?keyword=siemens+dca+vantage+analyzer+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445104/normal_5fa2029b28c67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389107/normal_5f8e45abd419d.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/vazasagitute-rojanavivevaj-vazil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5f9008d9113a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405902/normal_5f9eb3bd18f94.pdfIn PDF document text
    • https://fipaziditude.weebly.com/uploads/1/3/4/4/134465794/9570482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383805/normal_5f9958f6261d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384820/normal_5fa580e4e113a.pdfIn PDF document text
    • https://xixunogada.weebly.com/uploads/1/3/4/3/134343035/53c3b09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476582/normal_5fa60443be493.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/90b80ec7-78d4-4926-b687-b07274af9fa7/coc_free_gems_hack_no_human_verification.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/ashleys_furniture_sales_san_marcos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d411f0b6-d918-48db-8fee-e74499de53c1/pilgrim_cove_camp.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/abnormal_psychology_textbook.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D49 5344 bytes
SHA-256: 779b82c8b07e36f4668675ccc338a0360a393babb8fd0e17d1feb4751ddf4dd4
font_01_sfnt_off00005f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5B 9456 bytes
SHA-256: 54d4ca640d562bc8983fbb2fdfb7acc347a2a93e570f5267781d4c699bbbb445
font_02_sfnt_off00007fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAE 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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