Malicious PDF — malware analysis report

Static analysis result for SHA-256 394533a5a10ad9f3…

MALICIOUS

PDF

65.7 KB Created: 2021-01-08 01:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: dd76c00d844462825d74b23335d9e62c SHA-1: 70520ea9b9437423d16d276e2d01b02d9b45c6fa SHA-256: 394533a5a10ad9f31637f2cb3e7620c280d7cdd82372971ba312701842abc772
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, characteristic of a link farm used for phishing or distributing further malware. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest an attempt to redirect users to malicious sites.

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://trafftec.ru/123?utm_term=blocky+combat+swat+3+jeja PDF link annotation
    • https://cdn.sqhk.co/kikutajaz/ghi0khi/clouds_song_lyrics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475577/normal_5fbe558d1c28b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462368/normal_5fe0041b9d547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459623/normal_5fa3c8a21f6af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367296/normal_5fa044533df72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379616/normal_5f9e30e43296a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424997/normal_5fd76ef22e2b8.pdfIn PDF document text
    • https://gimitowogavu.weebly.com/uploads/1/3/4/7/134746983/20daf7.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/ibUtmhb/ritepexoninojulisu.pdfIn PDF document text
    • https://cdn.sqhk.co/dusimefosix/ilhbibX/vanilla_cake_recipe_easy_at_home.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/giahegg/47110077083.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/tomamujuf/tipuwegisemedo.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/kemebopovovituzoleburu.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 2

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_off0000c358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC358 5536 bytes
SHA-256: 1ba621d7dd2288ba808efed773451f455e15bc4acb98e5c735e58bd014af522d
font_01_sfnt_off0000d63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63B 10484 bytes
SHA-256: f7dfa48215d06b6ae1400bc8bcc3fd694f6358cc7a48d0650c8babc216bf7f90

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