Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4f2592ccdd69684…

MALICIOUS

PDF

85.9 KB Created: 2021-04-01 14:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 65948c8264621dd677ba36910787f6a9 SHA-1: 5608b8de4b7809c531d573dd28a2a4e61ca8b61a SHA-256: f4f2592ccdd696845f494e12c05b83b9a0756c3a80f21cd121939a78ecd389ad
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/award?keyword=ayyappa+bhajana+songs+telugu+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479223/normal_600e133b78ca5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461229/normal_6059ac363871c.pdfIn PDF document text
    • https://roxobirunuj.weebly.com/uploads/1/3/4/0/134096027/71332b355fa5c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420587/normal_5fc6a9d3be3c3.pdfIn PDF document text
    • https://cdn.sqhk.co/vavetiset/2hfd3RJ/juzowex.pdfIn PDF document text
    • https://nibuwoxemunovox.weebly.com/uploads/1/3/4/7/134714338/kuboxisoziguwos.pdfIn PDF document text
    • https://wezifujizofuji.weebly.com/uploads/1/3/4/9/134904593/4e6d1442a4d6a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386336/normal_6018e1f8cfeab.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/hfgeigd/11051634262.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387412/normal_5fcf10d53832c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448113/normal_5fe35e977a7e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/39c81e37-3668-4e7c-b888-ef54605a5e26/xevisodisilopurexazadogud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00f5b52c-ff5d-4a6a-b313-150950fda52e/fizajufubixoxujitavapomuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9918799-6857-490a-bb03-cc44e364706f/how_much_will_cost_to_install_a_garbage_disposal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63dd62da-80e3-42e8-bb23-5ce997e37234/onkyo_tx-nr616_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/112d8c31-8223-49e0-8db1-a55f84365862/ladipavexipaxikebox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4e2fc9-75af-4953-9bd3-89572a8936ef/acer_aspire_v5-431_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03e7fe5a-3804-4708-b405-dde1456c797c/how_to_learn_english_for_free.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_off000113b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B4 5512 bytes
SHA-256: b8968ce2620883f44feaed17dd6c49605356ab5f6907d721a53f3efa608e16d8
font_01_sfnt_off00012681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12681 11008 bytes
SHA-256: a4ad8ad03654453dd37e80d67f49124ddbb24907cb02b161ca429fb3a09c489d

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