Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6a5b8adbef3c6a…

MALICIOUS

PDF

65.0 KB Created: 2020-12-28 05:10:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e796aa662820db56dcd7ad833e300cc4 SHA-1: ff41f6f97239d36ed805945effa7a765d33c2a46 SHA-256: bd6a5b8adbef3c6a092608049c22906cf804df4d226454ef74bf936ca6346155
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful sites.

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
  • 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 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://traffking.ru/123?utm_term=bob+pond+blueberry+farm In PDF document text
    • https://mevuponepom.weebly.com/uploads/1/3/4/8/134899748/0deaa421ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_5f97724ca02a0.pdfIn PDF document text
    • https://dabituge.weebly.com/uploads/1/3/4/3/134344098/28ad725bf3fe.pdfIn PDF document text
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/zojajubumazivu.pdfIn PDF document text
    • https://gexawagezawa.weebly.com/uploads/1/3/2/6/132682787/jegogawejolisiborap.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/EBjiHhj/34578114261.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/0dcc7234-0c90-49f0-8139-7518dcc80346/11024260774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b179026-335d-4997-80c2-a4f98482a77c/zuranitowasotolomuxaj.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/warcraft_guardians_of_azeroth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86e50cfd-b109-4525-ab38-d35451a16fb8/13166743950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e393578e-d50c-459d-a096-7abdf306ef94/vawobiwunewalorewopazere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bca6a70b-bb96-441f-84ed-8097b3b111b4/12521478850.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A8 5300 bytes
SHA-256: e7ae2644c83218e6f6ab84bd0737a4bcddbeedb09450f3acbb1af9dd5f79278f
font_01_sfnt_off0000d4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A1 10072 bytes
SHA-256: 2c4f279c9d4b2ad2054023fb081a546d9210ffd15264a6969865b5b38f09e666

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