Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2af1a9ac9afad06…

MALICIOUS

PDF

66.2 KB Created: 2020-12-05 20:46:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9a91b1191acb9b5cf6a7cc11c2de4f81 SHA-1: 9d69a0d7f0619b2e2a00ee45f22d139e0bd44f20 SHA-256: d2af1a9ac9afad06599b96d82739ced6f1123e96ba2375832bc1b42a309309c3
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/123?utm_term=formul%25C3%25A1rio+padr%25C3%25A3o+de+autoriza%25C3%25A7%25C3%25A3o+de+viagem+internacional+editavel PDF link annotation
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/wafofala-logolirozid-zevadegajirut.pdfIn PDF document text
    • https://vuxomikum.weebly.com/uploads/1/3/4/5/134587944/7176754.pdfIn PDF document text
    • https://xawiwewediwo.weebly.com/uploads/1/3/4/0/134017039/b8dedeecaea.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/44a42da45d.pdfIn PDF document text
    • https://kupefuvewugixo.weebly.com/uploads/1/3/4/8/134849821/961081.pdfIn PDF document text
    • https://menaxogem.weebly.com/uploads/1/3/4/4/134432074/mugajuba.pdfIn PDF document text
    • https://vodeveta.weebly.com/uploads/1/3/4/6/134611656/mikomixoz_kumudufimivimar_xavimujezosi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe40509ee0f32b871fd5ba/1606303825297/conscious_discipline_becky_bailey_workshops.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0672f60f2895dc1e54ab2/t/5fc3b2429b1ed035384ddd6a/1606660676629/wilson_county_register_of_deeds_wilson_nc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65124df132613bbe271c4/t/5fc820d88eecd53e39ddff67/1606951130015/penojojijeda.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/29057476994.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/42338061177.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/zivigamupukom.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC151 6012 bytes
SHA-256: d5b2e65c4b3a553f31f9abeee40f518b0992002eb97b5d1ae2fa5c46e2e160cf
font_01_sfnt_off0000d456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD456 11848 bytes
SHA-256: f0898117720e38d37f10a482285fe1d1f1091c35f63bc079bb8291e33ca7f187

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