Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29d795d554caeb8…

MALICIOUS

PDF

76.6 KB Created: 2020-11-18 12:10:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c66ba1a643af5e4e0093bd99de09d963 SHA-1: 98f0dd93609921b483796b85bf071bb584a31cff SHA-256: d29d795d554caeb84ceac37c0bfa5f0d97c271aa875d0a943798b84472d31a0c
244 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=hot+potato+cafe+kitchen+nightmares+danielle In PDF document text
    • https://zamomojufowa.weebly.com/uploads/1/3/4/6/134613680/4755988.pdfIn PDF document text
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/negasezufit.pdfIn PDF document text
    • https://gofobodobade.weebly.com/uploads/1/3/4/4/134444694/776226.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kinufijozulof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392853/normal_5f9f07d9261c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420612/normal_5fa4ebe0e4861.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411937/normal_5f9715d7c0d0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450517/normal_5fabdf89d96c1.pdfIn PDF document text
    • https://zadujemerumid.weebly.com/uploads/1/3/2/6/132695269/mikuwuzamatas.pdfIn PDF document text
    • https://zosopomejunij.weebly.com/uploads/1/3/4/0/134040517/8d3cdb977.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mefovu/ss_perforated_sheet_manufacturers_in_ahmedabad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/827d3070-0495-47b9-917b-a266afc0a084/41865596278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ebd2443-a4c7-4aac-b3f6-53acfef22342/gates_belts_crossover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59037f32-9b6a-4fa5-9369-adc9f29cb082/25499549073.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FE 5596 bytes
SHA-256: 63f18d0908b951a2989fa562eb88cf3d7ec3fd4cdbd1244c3132ccdf48bee55a
font_01_sfnt_off0000eadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADB 10700 bytes
SHA-256: 39a8093103c63ae1ab5cdcc10ceaee42cf885b097edb1251a0685ab913c92c37
font_02_sfnt_off00010f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5C 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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