Malicious PDF — malware analysis report

Static analysis result for SHA-256 805caa3a05b629fb…

MALICIOUS

PDF

69.9 KB Created: 2020-11-23 08:20:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e71491b5a71331a95eed94d9dc12884b SHA-1: 56ba3873c5a961936e97d1d6d9ed6acc9841a803 SHA-256: 805caa3a05b629fb3936a33fd820cbfc0aeead783645fe8aa8dfc6366d435cd1
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains numerous embedded links, including one pointing to the known malicious redirector 'traffking.ru', and others hosted on disposable domains, suggesting a link farm or phishing campaign. The document body's content is heavily obfuscated and appears to be a lure related to a speaker manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=anker+classic+bluetooth+speaker+manual In PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/rexezokefolarawifaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5f886f9dde117.pdfIn PDF document text
    • https://jesodiretax.weebly.com/uploads/1/3/4/6/134659119/wufoxef_xisowagapasesix_zevadonudemelep_mozivomebuxij.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/samesuseliju.pdfIn PDF document text
    • https://xemakoxen.weebly.com/uploads/1/3/4/3/134320116/11888fd1980bf17.pdfIn PDF document text
    • https://pinoxelu.weebly.com/uploads/1/3/4/1/134108818/6a2a17.pdfIn PDF document text
    • https://naxibozagut.weebly.com/uploads/1/3/4/5/134580084/524184fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407986/normal_5fa7aa9f7ed3d.pdfIn PDF document text
    • https://zifusiwi.weebly.com/uploads/1/3/4/6/134686012/jitemumewekivar.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/jedaxopopuko/backyard_wrestling_ps2_iso.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/53978795547.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_off0000d4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B7 5368 bytes
SHA-256: d5202f22da630489ca8bedb18e5b639dfa722ecf44b9c25f77454e0a3083eb4e
font_01_sfnt_off0000e6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C9 10688 bytes
SHA-256: d5bf97969799d58d4a09a7a314bf7c61dd84735ad6f90e005582c701eb992697

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