Malicious PDF — malware analysis report

Static analysis result for SHA-256 60360955ffb6efb2…

MALICIOUS

PDF

68.1 KB Created: 2021-03-28 08:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9361d60ee56a53b5713d2f8823858a87 SHA-1: 2d2563d182648f1b6030d5496172cf2937860fd9 SHA-256: 60360955ffb6efb217acbee77b5b4ca25edd32b44b91a32ba69d96404fe1fc9f
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.8131

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.
  • 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
  • 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://crophysi.ru/award?keyword=adobe+flash+cs6+animation+tutorial+pdf PDF link annotation
    • http://xenakasewexibal.sportsontheweb.net/pusapizanapobumonufiju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456114/normal_5fedd3ad7af9b.pdfIn PDF document text
    • http://pusovemolexed.scienceontheweb.net/23183077416.pdfIn PDF document text
    • http://wonnaturila.space/antonyms_vocabulary2o0r5.pdfIn PDF document text
    • http://cheatyou.site/excel_vba_programming_for_dummies_download1vqsg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490141/normal_603c4809297f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387929/normal_60004b5deb10e.pdfIn PDF document text
    • http://rolivazugatar.scienceontheweb.net/84761705669.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491410/normal_604ebd7297623.pdfIn PDF document text
    • http://grizhoff.ru/ccna_3_chapter_3_exam_answerstcwoo.pdfIn PDF document text
    • http://fiziwafofekaku.mygamesonline.org/73422425887.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446917/normal_60027d2fd72bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fa5d8e44-005d-4c05-925d-ba60cb7f5023.filesusr.com/ugd/121e37_1d722f6c720d47c2846e67f74e850526.pdf?index=trueIn PDF document text
    • https://a72a44ae-2aae-4d6a-a6c4-235301d0a62e.filesusr.com/ugd/57436b_5df1329c6d5b4608995a223376955a1e.pdf?index=trueIn PDF document text
    • https://f621ecf8-e26c-4db3-9bdf-176eeceb312d.filesusr.com/ugd/b3755e_5d0557e6f3ad4200b284111ed72c93c9.pdf?index=trueIn PDF document text
    • https://edb7bb8d-792a-4213-93ec-7f573d37cc74.filesusr.com/ugd/bfd504_fd71c2381c84450986de5668b1d23415.pdf?index=trueIn PDF document text
    • https://4461694d-a6f7-4a69-895a-ff5ddeb3c622.filesusr.com/ugd/f504fb_51d7b20e0a8b4d7b85555ae102f043c1.pdf?index=trueIn PDF document text
    • https://e42ce0b3-f376-4cb5-9abe-507fdbb9570c.filesusr.com/ugd/603474_0f8b39b93e2f450cadbbdb68afd027f8.pdf?index=trueIn PDF document text
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_5e2fd82d3c05483fa5cf23bf0517cfbf.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10059 5560 bytes
SHA-256: 0b570a1cd77f3701fbf8dfd163aa104a417a8d6d647dc795608a826526881fe9

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