Malicious PDF — malware analysis report

Static analysis result for SHA-256 0536e646bf82b701…

MALICIOUS

PDF

80.1 KB Created: 2021-02-28 11:05:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 33d54d104f77b3e764b44079ceb45a2b SHA-1: 3bc6cb2bf68fbc9f6358ef26e7509279b3b16966 SHA-256: 0536e646bf82b70165d9b6a9df153b177a45120bd88b7061c128c1b8707c6dfd
156 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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=iso+27001+lead+auditor+certification+cost PDF link annotation
    • http://chaptejvxz.fun/43498353495a421w.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/haiiijR/mega_jump_in_doral.pdfIn PDF document text
    • http://qrettalq.online/in_cold_blood_book_cover_image8b82m.pdfIn PDF document text
    • https://vuzavadakugodo.weebly.com/uploads/1/3/4/8/134857872/9151126.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/Clhbbgj/what_do_you_meme_the_office.pdfIn PDF document text
    • https://sepoxoritafide.weebly.com/uploads/1/3/1/4/131438330/781411.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/boxing_star_apk_mod_1._2._0t6npo.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/bd3a7174c9cb60.pdfIn PDF document text
    • https://cdn.sqhk.co/fudikeraz/hjieZgc/idle_robot_build_your_own_mecha_hack_apk.pdfIn PDF document text
    • https://vusutiti.weebly.com/uploads/1/3/4/7/134762674/tunisefutebododato.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/jusagi/zafexodipagag.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/wotoramepe.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/tubutajutetipodidefuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/kaxozazowurusofiza.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/komekezotokegal.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off0000e76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76E 5356 bytes
SHA-256: 7cbd2dab17f24e7545c604d2a7479f4cc10abf883624e80d69bbf05eab210520
font_01_sfnt_off0000f9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C4 10460 bytes
SHA-256: d581f862ff4f3ef19e837aebbbf340e64d9bffd8e3440bc36cb3b62ca5ca18e9
font_02_sfnt_off00011d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D87 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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