Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f21c16ab1c8f720…

MALICIOUS

PDF

79.5 KB Created: 2020-11-14 02:41:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4e75853ae79cd2da4eaa4c9e06433473 SHA-1: d5dad40b5f95dfa98cdef67472d1c5edda99bf06 SHA-256: 5f21c16ab1c8f720146f6ab10d6f831983def4bd6650fb4e61c49d73d3d7c488
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 0.9996

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://trafffi.ru/strik?utm_term=pokemon+2000+full+movie+in+tamil+download+it PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427095/normal_5fa5aa53c0a5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378175/normal_5f8dc049bcecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f9b43610085c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388283/normal_5fa11262c434b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450636/normal_5fa807893e5c4.pdfIn PDF document text
    • https://gobumireg.weebly.com/uploads/1/3/1/3/131383916/sinebus-mubidodukij-balud-vodagil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5f877e604e31b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454967/normal_5fa194c84c908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374211/normal_5f8d5dd4efeb4.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/dedinavesute/sibalenano.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/close_quarters_thrower.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/dakomeguvizabofamupavafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e7e1115-3ffb-4691-bccd-78ad17ec031f/39_clues_free_download.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD508 3156 bytes
SHA-256: d18f7ed1942a6479cf041505d7d4ddd27a749274ca930815e96dfed59b277998
font_01_sfnt_off0000e054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE054 5152 bytes
SHA-256: 7a89412f9b723a48512aedc564fc6793bc549dd458a23e4ea6ebf0aa78867c6a
font_02_sfnt_off0000f1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DF 15380 bytes
SHA-256: 42d8561f3c7f78f9894e1837c17db1ef832b3660f6fc46a80a0913c156edfa3e
font_03_sfnt_off00012231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12231 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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