Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7074e124d4abd3c…

MALICIOUS

PDF

83.2 KB Created: 2020-11-18 02:30:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 52dcd38e90e602085d323949b0ad8bf1 SHA-1: 883bdf4128beca4ac1060f15b0021eee0c9e4109 SHA-256: a7074e124d4abd3cf05a677f776f561e31b97f6f57c2a71765c452502f83dec2
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, many pointing to disposable hosting services like Weebly, and one specifically to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these linked PDFs. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=morrowind+spellsword+build In PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/17ea301b7ab4974.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/9692696.pdfIn PDF document text
    • https://takotifisusa.weebly.com/uploads/1/3/4/4/134499816/sipex.pdfIn PDF document text
    • https://texolobalow.weebly.com/uploads/1/3/4/5/134597330/tonig.pdfIn PDF document text
    • https://pafetuvuwube.weebly.com/uploads/1/3/4/3/134321561/2412990.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/3326255.pdfIn PDF document text
    • https://duxixujojive.weebly.com/uploads/1/3/0/7/130739103/saduburusox.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/f85e7cf7-dce5-4e5c-8c8c-fac3d632e07c/xomabibibonoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adac530c-18b8-4b17-9afd-635dfea167bd/10173918344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2695486c-71fa-4beb-b560-53ea823c62b7/pumabevorukadew.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/the_sims_4_island_living_torrent_codex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/293cfbbf-4a9d-44c9-a560-ce3859a47288/canon_sx50hs_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7db94a9f-b758-4846-8fb2-5d43cea41abe/53522639577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b131b21e-82ca-463d-98ba-191d91bc62b1/41949173193.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_off00010a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A06 4980 bytes
SHA-256: e0b39704dbf3295d741c18d8546192fe405f34a6c19f6075fb0c6f509ab38818
font_01_sfnt_off00011b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B19 11060 bytes
SHA-256: 1ec2f9394fa554abf3fcb38511b6eec8d6a5ca660d9f208e703de7222c7b22ea

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