Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf45b39a9b34176…

MALICIOUS

PDF

72.6 KB Created: 2021-01-29 18:49:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a6e116f99c391baeeb5021c8adbfe9c0 SHA-1: 8976026a7db651670b30be4a4e8fc306e68429e1 SHA-256: adf45b39a9b34176d433dd61bfd676c9bf6c2c83c0214d6bc8c6603c7593f895
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a "PDF_SEO_LINK_FARM" heuristic, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The embedded URL and the document's metadata, including references to "Golden Gate Bridge movie" and "wkhtmltopdf", further support this. While no scripts were explicitly extracted, the presence of numerous external links and the ClamAV detection as "Pdf.Phishing.Trojan" indicate a phishing or malicious redirection attempt.

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
  • 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.
  • 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://leonvi.ru/123?utm_term=golden+gate+bridge+movie PDF link annotation
    • https://cdn.sqhk.co/parabeset/jKhgi3D/29928813086.pdfIn PDF document text
    • https://betirowi.weebly.com/uploads/1/3/4/6/134661799/97d31fe0ed9.pdfIn PDF document text
    • https://gixinizolovuz.weebly.com/uploads/1/3/5/3/135348456/wosar-bavamaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/rusobotakox/fobja2t/julufesami.pdfIn PDF document text
    • https://larigagip.weebly.com/uploads/1/3/4/8/134887586/lubujekafesupal.pdfIn PDF document text
    • http://wirodapupoz.iblogger.org/cash_flow_analysis_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/pevelefotuve/gigKia1/zizutusuwifebewokobisa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445889/normal_5fca0b8a19355.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rubijisezet.epizy.com/lumulerelafazi.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/93891239179.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/axios_post_form_data_vue.pdfIn PDF document text
    • http://faxanudof.epizy.com/koparamigomibijom.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/10297780274.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/alone_movie_songs_audio.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_off0000de89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE89 5200 bytes
SHA-256: 0bc53987e966510ff556f11d2f94c13be3facf855fc9f22adaad02f4901dd7bf
font_01_sfnt_off0000f02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02B 11004 bytes
SHA-256: b3335947886a56dc3b125f9092bdab5194ef7c3b529a5d1cb9009a336244e335

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