Malicious PDF — malware analysis report

Static analysis result for SHA-256 40f5d98f429a0332…

MALICIOUS

PDF

72.6 KB Created: 2021-02-13 11:53:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 53a58c3d07254345785044d041cd8238 SHA-1: c4d47a6e8573e1766896b9f060ec1e977754588b SHA-256: 40f5d98f429a033253461072a690f41fd750939a00083b81861deb7c0ae9df45
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF contains a large number of external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malicious redirection attack, likely delivered as a spearphishing attachment.

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://seumenha.ru/123?utm_term=miami+central+senior+high+school+alma+mater PDF link annotation
    • http://ashotik.space/need_for_speed_rivals_cheats_xbox_360apbdd.pdfIn PDF document text
    • http://usmileofficial.site/beneath_the_skin_movie6mpxq.pdfIn PDF document text
    • https://cdn.sqhk.co/tilafukefuwe/izgeSie/66429532375.pdfIn PDF document text
    • https://waxukazo.weebly.com/uploads/1/3/1/0/131071095/6194801.pdfIn PDF document text
    • https://sezijaxafiv.weebly.com/uploads/1/3/1/6/131637080/3481520.pdfIn PDF document text
    • http://filemarker.store/bobipusaxaarrs2.pdfIn PDF document text
    • https://jolexufawiro.weebly.com/uploads/1/3/4/5/134595506/sujedinutizokal-lujetilimivos.pdfIn PDF document text
    • http://lexusesadedebaz.22web.org/11475598475.pdfIn PDF document text
    • https://kopupoko.weebly.com/uploads/1/3/4/4/134471128/7c1693d9dd2.pdfIn PDF document text
    • http://pitushok.space/angular_file_from_s3b1yqc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mixanaz/2544064630.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/aradhana_songs_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/cushing_syndrome_case_report.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/kuzuxit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD072 5008 bytes
SHA-256: 0ab41739a0cd6ab7f09b32bf70b4bbe3c90743a1f8985f2dcf270641c1698399
font_01_sfnt_off0000e13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13B 11240 bytes
SHA-256: aeb4f88469bf817e516971ba46f636093cc97222e248744aca6f4ea7e9247792
font_02_sfnt_off00010751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10751 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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