Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeee4c7475a0e2e9…

MALICIOUS

PDF

75.3 KB Created: 2021-02-22 02:29:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: ae5aab13d1255b6e4c73743405dd90d9 SHA-1: 596e7690c450f96312821365e1e5978a7b8bebcc SHA-256: aeee4c7475a0e2e944721a1273e71ed30750d83059b1fdfd8f71cd4eddbdce51
184 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to disposable hosting or known redirector infrastructure, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though partially garbled, contains text related to search queries, further supporting the lure-based attack pattern.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+much+is+an+electrolux+vacuum+cleaner In PDF document text
    • http://itclick.pro/planet_coaster_scenario_guidertkxq.pdfIn PDF document text
    • https://salupoxegiras.weebly.com/uploads/1/3/5/9/135961269/xunodekanob_jureseb.pdfIn PDF document text
    • https://gafirupi.weebly.com/uploads/1/3/1/3/131384721/d669b3.pdfIn PDF document text
    • https://ramaxudefe.weebly.com/uploads/1/3/4/0/134042793/a59d1a9879f.pdfIn PDF document text
    • http://d2-club.ru/ziwelowivutepetilibopijogto36i.pdfIn PDF document text
    • http://majidadap.22web.org/fbise_scholarship_form.pdfIn PDF document text
    • http://meriline.store/derrida_artaudqh5t9.pdfIn PDF document text
    • http://zubiki.top/safety_first_everfit_car_seat_safety_ratingsgfl2w.pdfIn PDF document text
    • https://cdn.sqhk.co/jadizefon/igjdkeB/logo_quiz_minimalist_level_2_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464724/normal_5fe5362ab1603.pdfIn PDF document text
    • https://kexezesokofu.weebly.com/uploads/1/3/3/9/133986719/gavulolug.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/jhjhfCP/zadidedarufa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pusaxedufa.rf.gd/94604114284.pdfIn PDF document text
    • http://bilunijo.epizy.com/fundamentals_of_microelectronics_behzad_razavi_2nd_edition_solution.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_off0000e8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FF 5220 bytes
SHA-256: 764935cadc70de7fd88cae0e7ec1de58c8a0ee22f3997c31c5e5cf42b4581079
font_01_sfnt_off0000faa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA9 10916 bytes
SHA-256: 24ffb6fccc8c7a1b8aacab6ff86a782a143e626b3bf82541170a6be99f1385d7

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