Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6c80dc62561141…

MALICIOUS

PDF

81.7 KB Created: 2021-03-03 18:24:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a3a7ed5d010c6a1f5bd79b726e381980 SHA-1: a088d1ff9596fc556d900871cc413ae30e114566 SHA-256: 9a6c80dc62561141c319f4a5c5eea587019c69b390cdaf485c65ee14c92bb552
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a domain associated with link farming and disposable hosting, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains keywords related to search queries, reinforcing the lure aspect.

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 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://druttle.ru/award?keyword=why+is+my+ue+boom+2+not+charging PDF link annotation
    • https://cdn.sqhk.co/ruwonumatag/Y2ha2ii/18784844746.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwogoxozoxi/Hhe5jhX/random_video_call_online_website.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tudibakigar.epizy.com/the_giver_chapter_10-13_summary.pdfIn PDF document text
    • http://kasedabinat.rf.gd/ravem.pdfIn PDF document text
    • http://zafipuzekamezu.epizy.com/academic_calendar_template_by_vertex42._com.pdfIn PDF document text
    • http://jevusavisa.epizy.com/xosefobudogudetugak.pdfIn PDF document text
    • http://mogivinisisa.epizy.com/35923858486.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/bobinage_transformateur_de_tension.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/59748068546.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/8461334777.pdfIn PDF document text
    • http://gokevoluwizob.rf.gd/barcode_label_creator_software_free.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C7 5568 bytes
SHA-256: 381a9bf65b685760bd7242bf96736170b028bfa62890de3889e3d662678834b8
font_01_sfnt_off000116a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A0 10424 bytes
SHA-256: c056151c41897ed837ea62592fd6dd12b410ca30c473f1af29caa5783c6a678c

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