Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4d18bf4e8e13a6…

MALICIOUS

PDF

72.8 KB Created: 2021-06-11 13:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9cc768352b713862f78c8f49f16977dc SHA-1: 4b3139d9d76f95197c946036829a37123ccfad0d SHA-256: ea4d18bf4e8e13a6abe43da794b11d5a5b661b3df1df79a814e0c57662b21d96
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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 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://laborke.ru/pbw?utm_term=dnd+5e+character+sheet+pdf+fillable PDF link annotation
    • https://ruvipubelid.weebly.com/uploads/1/3/4/6/134608961/suruxagefenoladokotu.pdfIn PDF document text
    • https://xulijijexam.weebly.com/uploads/1/3/1/4/131453336/2091053.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4379601/normal_60b4b299429e2.pdfIn PDF document text
    • https://vinatazuxazeki.weebly.com/uploads/1/3/4/6/134641263/kakol-zezusapelevip-kigemij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477183/normal_6002164caca34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463830/normal_5fd67e1a64cc1.pdfIn PDF document text
    • https://xumabilere.weebly.com/uploads/1/3/1/1/131163638/6eefb.pdfIn PDF document text
    • https://pogivigewe.weebly.com/uploads/1/3/1/4/131438874/joxomukosanadobeda.pdfIn PDF document text
    • https://wuwepila.weebly.com/uploads/1/3/4/3/134371533/405dfd159b7c9c1.pdfIn PDF document text
    • https://sazigusejif.weebly.com/uploads/1/3/4/7/134771803/xirom_zaronakusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471682/normal_60339353b119d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5fd2de100df27.pdfIn PDF document text
    • https://zezojafoxivofed.weebly.com/uploads/1/3/4/5/134528913/7a721faa6f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/36c884c4-28ed-4cc5-b3a0-e8b1b8015aa1/1066230817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9455467d-85cf-4362-a7ea-e90759278ad8/wuwojalodaxol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c2bfb02-8be5-4a90-b20a-aa0d958da010/what_is_the_importance_of_play_in_early_childhood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/465fc8cf-897d-4df6-84f0-b0e9f2aad36f/57712813612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a64413eb-7565-4fb1-ae9e-57deb1c422f7/angela_maria_morales_velasquez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb549e6c-ff53-45f8-8a3c-9442f300833b/short_story_prompts_horror.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9c03784-9b6c-4806-ad1d-d6fdd05e00fc/57383457622.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_off0000e18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18F 5504 bytes
SHA-256: 61cf23e383a18c1e80aed648305eabcc70bc97ff84e6b690064ebd27113d367f
font_01_sfnt_off0000f445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF445 9688 bytes
SHA-256: 8f1243c07abb252e3fbe5275d4b3e238036cef5ad20671744aac3f73fc26a9e2

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