Malicious PDF — malware analysis report

Static analysis result for SHA-256 63b6ce12dc92d0c6…

MALICIOUS

PDF

93.6 KB Created: 2021-03-16 13:46:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d9b78118f76a446c5526c91e2dd15817 SHA-1: 1cb6fe20c5a1be87da724f5551837affb664081f SHA-256: 63b6ce12dc92d0c655a019dec02dd2b97c26f51a08d7310a0ae6c7b30fcce5bd
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-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.
  • 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://maypoin.ru/wix?keyword=tippmann+x7+manual PDF link annotation
    • http://hookup157.online/80746697347b0fdg.pdfIn PDF document text
    • http://housefashion.ru/kilufolokelimolibotz8cbz.pdfIn PDF document text
    • https://cdn.sqhk.co/kogewole/hfhhfif/21074648464.pdfIn PDF document text
    • http://italy50wow.pro/2512981131hd1qs.pdfIn PDF document text
    • http://mestorating.ru/binibutagasimewidirugpttj9.pdfIn PDF document text
    • http://trokot-online.xyz/smart_auto_call_recorder_provlfz6.pdfIn PDF document text
    • http://idealica-official-it.website/fuduninitegirusogugag2okqh.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/biome_in_indianapolis5e1vc.pdfIn PDF document text
    • https://cdn.sqhk.co/padezeda/yga5iaX/32502783377.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/gaLjchf/61687896892.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_715932ba895644c99ccc77bb49e8c873.pdf?index=trueIn PDF document text
    • https://d99d9bf7-a5e0-49f2-90ac-0d1bc881463d.filesusr.com/ugd/0182ef_cf60d0bf2845469b85b2719a722788e0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3094c793-6c52-459e-b572-8232d612e91f/15066543804.pdfIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_d47d8c6f44fe48c48dfa4c98cb3735c5.pdf?index=trueIn PDF document text
    • https://3c86e5df-9a55-47dd-9d5b-c207b25ec6cd.filesusr.com/ugd/72bf36_362255562b6b4ffbab210c87d6b4e56a.pdf?index=trueIn PDF document text
    • https://233b4d2f-9c44-4004-b776-098ebc281e6f.filesusr.com/ugd/7f980c_b3787d535abf4789bc58573d1f17391e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e72c4ac-b20e-49ae-920f-57c0956ae527/the_girl_with_the_dragon_tattoo_book_sequence.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_off00012ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA0 4788 bytes
SHA-256: 6c87ddd58602536be77755289e86268be6bf163d86bf0bcfe96b4442babe7a0a
font_01_sfnt_off00013ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EE3 13908 bytes
SHA-256: 00b8d32685990ee1eede0781fce3bfcbeab07ffd4a942575d8120bb41485df77

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