Malicious PDF — malware analysis report

Static analysis result for SHA-256 8af08cf9af818f56…

MALICIOUS

PDF

78.3 KB Created: 2021-04-08 03:09:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 14f871a5d207db86ee4e541b72c86a22 SHA-1: 5aba9d5d54e6d334ea933c1fedc9205b2ebe2da0 SHA-256: 8af08cf9af818f56cf6cb55f0f7b4549510109ad426e9ba228e909ca24aab819
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 0.9998

Heuristics 5

  • 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 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=tekken+6+for+android+apk+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474446/normal_5fdc061ad7905.pdfIn PDF document text
    • https://cdn.sqhk.co/dexizajifu/mgeih5d/bubegebo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471995/normal_5fddb37b500dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387581/normal_5fc99a7514f76.pdfIn PDF document text
    • https://cdn.sqhk.co/ganinidunop/hbvjaac/single_column_research_paper_template.pdfIn PDF document text
    • https://cdn.sqhk.co/wireriduwude/fjegjhb/20152179824.pdfIn PDF document text
    • https://cdn.sqhk.co/mutuwatu/dRKijhj/36600206556.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e26dc784-fa46-4601-9f6d-57686faaf216.filesusr.com/ugd/c66525_7ebd6819efb94d79a2e2892aec308991.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f43c5f89-5c13-4948-8d03-97833ad1b752/bosilopokiviradapitawaw.pdfIn PDF document text
    • https://e8e87dc5-637d-47ba-9de6-e7d98d123d78.filesusr.com/ugd/a69a03_25f8506d684348529108f32a55ced7b9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/61808517017.pdfIn PDF document text
    • http://wumugajus.onlinewebshop.net/15221679861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6827af8e-a482-47eb-be90-4f1d466f4dc6/94265292323.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/67863234793.pdfIn PDF document text
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_c187f9c30eef4400bc958030bd68f2a9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b0e02e5-1f69-4933-a644-1090a2c9701d/pejosiziroriforofibagabek.pdfIn PDF document text
    • https://83662c7a-80c1-4e94-b5a4-3df479670d58.filesusr.com/ugd/27be29_12242f8601d240b6b338e0c1c47a43cb.pdf?index=trueIn PDF document text
    • http://mawidinivetobi.myartsonline.com/divine_comedy_poem.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_off0000f2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BE 5116 bytes
SHA-256: cc529a47c5203a3cea340d8a5d0cd8783b919dae4d44f19c434a64d340981eea
font_01_sfnt_off0001044d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044D 11508 bytes
SHA-256: 09f11fd6832b1e6081018fca1c776c665bdfbbba384da03a5efdb0531548281f

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