Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f4662f6219cf0f…

MALICIOUS

PDF

67.8 KB Created: 2020-12-02 07:46:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fb365e511772a7ed1b0300cf620828e3 SHA-1: 27f77bcdb42aeb25a91000c9727346e93b021e75 SHA-256: d2f4662f6219cf0fe56b8aa9bd27102330d69c2347813aaa75ef9161c893a6e3
244 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and flagged as part of a link farm. One critical heuristic indicates a direct link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution, masquerading as a maintenance manual.

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://traffking.ru/aws?utm_term=2015+audi+q7+maintenance+manual In PDF document text
    • https://sepuvoguzunisam.weebly.com/uploads/1/3/4/4/134488558/gatepivedo-fipapujo-figedufave-vezusutizupol.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/sugen.pdfIn PDF document text
    • https://zafimalomaw.weebly.com/uploads/1/3/4/4/134458932/14c07c99446fe.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/xikulidoxifoma-muxaf.pdfIn PDF document text
    • https://kiroteveve.weebly.com/uploads/1/3/4/3/134378898/0d4c8ec94eb8fa.pdfIn PDF document text
    • https://jofowurifizowaj.weebly.com/uploads/1/3/4/6/134684387/3852173.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/mavixu/85132956669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a77381a-69bf-486c-b657-5f280cdc7954/mario_kart_ds_action_replay_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/725b4f1e-aeef-47b5-bf26-318806757f57/vepowosadulev.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf90a9d104e5f152d7cb6/1606220055564/tv_tropes_terminator_sarah_connor_chronicles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fd39097-580c-4917-9ae0-8c21082e9207/85061686142.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/hexagonal_prism_surface_area_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/dnevniki_vampira_12345678.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_off0000cc7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7A 5372 bytes
SHA-256: 3c0b5748a02f00bade51b6b64be0a2f473e563933015735e028d74fcf3053f41
font_01_sfnt_off0000debf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBF 10852 bytes
SHA-256: 57f903ba1bf916899db4bdb8d33680826905c81a0b91414ba2d194f0a2e5d847

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