Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff1a33cfcd4fa1e4…

MALICIOUS

PDF

75.0 KB Created: 2021-03-15 21:38:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ad22c603474786b12a4c3f2b593a0338 SHA-1: 9af5087cf54c89dce61697442f1a1c3c06ff1623 SHA-256: ff1a33cfcd4fa1e459c803b25b3bc37ccb6be178897947f6c34d6ee6190b492e
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 0.9999

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://baarspo.ru/wix?keyword=tupac+shakur+awards+and+accomplishments PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386366/normal_5fdf06a8589b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409114/normal_5feea1bc4601a.pdfIn PDF document text
    • http://xiruzox.mygamesonline.org/wowubituwavetevetot.pdfIn PDF document text
    • http://zatoxuvisovapuf.sportsontheweb.net/96501947477.pdfIn PDF document text
    • http://puwexakibo.iblogger.org/85854858118.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374368/normal_5fcf121f2130e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412570/normal_602dc7cb4131c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_02584008fe934de79b5b585fca5cf92e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e1fa0a-876c-4e6d-9d41-5172bd370322/lajutoviliwozixuvajeke.pdfIn PDF document text
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_ed688cc23c1a44e19ff203c10bd21fd1.pdf?index=trueIn PDF document text
    • http://varirojemixu.myartsonline.com/88635475539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/166592e1-d448-48ca-80ee-524b5ddbdf78/64980381741.pdfIn PDF document text
    • http://ruruwuvatokatal.onlinewebshop.net/logitech_k800_battery.pdfIn PDF document text
    • http://zefulex.rf.gd/99_names_of_allah_download.pdfIn PDF document text
    • http://netomadutimafe.onlinewebshop.net/bodybuilding_workout_plan_for_beginners.pdfIn PDF document text
    • https://7c9e9c40-2b96-4f88-8065-b5ff5e495659.filesusr.com/ugd/3bfcae_741c11542fd944b1a7b180a313f1566a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/955953cc-20af-4739-8fc0-0dcfe584ae3e/14897193264.pdfIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_21d779c98e094c39a75e09715cbb600c.pdf?index=trueIn 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_off0000e2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CB 5416 bytes
SHA-256: dbe19faae0baa9879ea87c20da97b2ad0c68a9f79c0a681de03e504ee54980da
font_01_sfnt_off0000f519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF519 11596 bytes
SHA-256: 2504fd82264862f31a35ea7474875f9e39e4a35828adad6c739fd07a851d2959

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