Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd6d233165cd569…

MALICIOUS

PDF

89.4 KB Created: 2021-03-20 06:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fa9f8340c8a4ece95795f9522b9547e9 SHA-1: 10a6c9d99a54be1f4072167aeb04686151a71603 SHA-256: cfd6d233165cd569cf7326e1bc3d053ed6ac7fce57b5c7f2703f61d9cb89c3d4
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/wix?keyword=samsung+microwave+me20h705mss+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4480898/normal_5fc86158cc8ad.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/laminated_object_manufacturing_reporta9t0e.pdfIn PDF document text
    • http://shoes-storie.club/76243428786x7ak.pdfIn PDF document text
    • http://ashotik.space/ditewoz1lpj.pdfIn PDF document text
    • http://trychambre.xyz/57941928865q9rht.pdfIn PDF document text
    • http://vizit.store/869834636231cw94.pdfIn PDF document text
    • http://amsidisi.xyz/abc_analysis_example58444.pdfIn PDF document text
    • http://center-about.com/zebojunonosodikiddhd6o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485576/normal_601d4f5d47177.pdfIn PDF document text
    • http://btsworld.org/business_insider_stock_picksg4is7.pdfIn PDF document text
    • http://kushtanash.ru/megorirovofelezigibkq2iv.pdfIn PDF document text
    • http://cafechorsu.ru/vudusofomefixezadisonak95a9o.pdfIn PDF document text
    • http://meetsoda.club/butelogorevowifuxalesfxljd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472788/normal_600b902fe53c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499309/normal_5fcab03c95586.pdfIn PDF document text
    • http://prechambre.xyz/738990052226223x.pdfIn PDF document text
    • https://vagoledos.weebly.com/uploads/1/3/5/3/135320004/sasakuroli.pdfIn PDF document text
    • https://zimegusak.weebly.com/uploads/1/3/4/6/134605775/a1b025c557.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://73856814-13bb-4d44-aeaf-752cce6ba6bd.filesusr.com/ugd/a0d21a_7bda279497af40d2925a245450514802.pdf?index=trueIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_e04c539710d74742a6f0502c072454b4.pdf?index=trueIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_919c807c8e6a44f39ee44a5d1aa11978.pdf?index=trueIn PDF document text
    • https://48e5b1ff-25fb-49a4-826b-3ad3f3a15688.filesusr.com/ugd/0d632a_9eeb75d2a3b6445db0d3b439d156db1f.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_off00011ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB6 5948 bytes
SHA-256: 9e553c8c54111f263c41e2562a192ae946130ebc0b70329c4b904d851660a6c6
font_01_sfnt_off00012eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EEB 12968 bytes
SHA-256: b19a19535373c405e92b916abd4ba20339ce4cc4f627bdca3f0c66b393b52578

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