Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b84e293d9890d60…

MALICIOUS

PDF

64.4 KB Created: 2020-11-25 22:12:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 875f4687ee069f30932f601267e96ff9 SHA-1: d0a9674f0902260f89b3885858bb682e5b750451 SHA-256: 2b84e293d9890d603a28754105ae7915c60f1054dc760b2af658fbeb3d5b9c45
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link farm with 24 external links, many of which point to disposable hosting and redirectors, indicating a phishing or scam attempt. One critical heuristic firing identified a link to known malicious redirector infrastructure. While no scripts were extracted, the structure and heuristics strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://traffmen.ru/strik?utm_term=peach+cobbler+bisquick+paula+deen
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/gevoderovepiru.pdf
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/devagananodunafod.pdf
    • https://dovasumaba.weebly.com/uploads/1/3/4/6/134627072/retitadikomaduzunid.pdf
    • https://ramojiri.weebly.com/uploads/1/3/4/4/134443871/xekurike-subavu.pdf
    • https://cdn-cms.f-static.net/uploads/4428069/normal_5f98e9c20da35.pdf
    • https://gipadakox.weebly.com/uploads/1/3/4/8/134884067/kakebidegebefag.pdf
    • https://xenolonaloku.weebly.com/uploads/1/3/4/4/134458783/7795721.pdf
    • https://cdn-cms.f-static.net/uploads/4470699/normal_5fa8a0ac801ba.pdf
    • https://cdn-cms.f-static.net/uploads/4427300/normal_5fb2e6541464e.pdf
    • https://wubepina.weebly.com/uploads/1/3/4/7/134721378/lejagowosoka_kujewanu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vebisop/budget_analysis_report_template.pdf
    • https://s3.amazonaws.com/jamokaroxoj/break_even_analysis_worksheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd63.bin
6d88bc506ea1e785c1c5973d077641ce6aa0d11acebdbe7a773247cb4b01e14f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD63 5492 bytes
font_01_sfnt_off0000cffc.bin
9ccc80976bbc9f48666186f8d0b3e9ced50df4da91b130f64d5c768d3e86ac7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFC 10956 bytes

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