Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea3ccab97e6ecd3…

MALICIOUS

PDF

70.2 KB Created: 2020-11-19 06:12:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 6173ac0d19335584c04f7101df6d6374 SHA-1: 1fcb33ee31b7ac57771b65aa4add4ce42fbf3dce SHA-256: fea3ccab97e6ecd3b3b9af260be8516acef6d1e48e8b0f0acefb43fe8e0e7450
156 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 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 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://trafffe.ru/strik?utm_term=plants+vs+zombies+garden+warfare+dow PDF link annotation
    • https://lesuwigiwojan.weebly.com/uploads/1/3/4/3/134309114/divigexulodota-piluvawiz-vidojegoro-xugiz.pdfIn PDF document text
    • https://taxufizewafodo.weebly.com/uploads/1/3/4/4/134477277/2455923.pdfIn PDF document text
    • https://xasigali.weebly.com/uploads/1/3/4/3/134363336/1010231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459318/normal_5fa87660a0c70.pdfIn PDF document text
    • https://jifurutirijiguj.weebly.com/uploads/1/3/4/5/134528482/2546370.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://s3.amazonaws.com/mexavofezoxi/83099803533.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/37231920363.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/xoravuxaxawuketulixumir.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/sentiment_analysis_and_ontology_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/fimusidunoxojemiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/25143703072.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/lego_hockey_goalie.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/perubakogukenu.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/major_fawcett_amazon.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_off0000c91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC91A 5360 bytes
SHA-256: 0ab40289ec75d6e0496491e57d64d25c30678d8292e9c6b73e6f7854300befbc
font_01_sfnt_off0000db50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB50 10028 bytes
SHA-256: 399839adddabad3146c59dd04acda0bdf3e108097ebde03e7149ded87b9e99b4
font_02_sfnt_off0000fdb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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