Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0796e793c3505b…

MALICIOUS

PDF

103.6 KB Created: 2021-02-28 15:03:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a41da036dc809f4c1d93ca894660ea20 SHA-1: a1d834d2f797a004b02b51e069fe7fa118ac6146 SHA-256: 7e0796e793c3505b0049030e2a41536562c463e70de16c43fb173cc478a99acd
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a high heuristic firing indicating it's a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The document body, though heavily obfuscated, contains keywords related to sales, which is a common lure.

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://bologen.ru/award?keyword=dillon+650+for+sale+south+africa PDF link annotation
    • http://kelnoteres.xyz/plain_navy_blue_t_shirt_template555g9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488336/normal_60118961c25a5.pdfIn PDF document text
    • http://xekokikimelaf.iblogger.org/mivofiven.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419423/normal_602b562360733.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/fVgjPji/zironegujapezaroxupefoxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500453/normal_5ffe98b85bab5.pdfIn PDF document text
    • http://swiss-gear-top.xyz/wamarafarugivnlhim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410015/normal_6007d8b5db87a.pdfIn PDF document text
    • https://cdn.sqhk.co/murafabu/hfjbihf/avengers_x_male_reader_one_shots.pdfIn PDF document text
    • https://cdn.sqhk.co/fifenije/dqPbghe/nesunujiruxuto.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/AhhS9ij/sandwich_factory_columbiana.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tufuripisaren.epizy.com/laperinivolefewu.pdfIn PDF document text
    • http://bomesesif.epizy.com/a_r_t_s_ka_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/jisizok.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/how_to_use_crackle_glaze_ceramic.pdfIn PDF document text
    • http://tuzuxutetug.atwebpages.com/what_to_do_with_a_cyber_security_degree.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/jupadu.pdfIn PDF document text
    • http://jawaduxivibono.epizy.com/99598584410.pdfIn PDF document text
    • http://latuwukatagowa.epizy.com/casanova_full_movie_malayalam.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_off000158a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158A7 5388 bytes
SHA-256: dfa1ee56a2e91a6632277ca1c53c9ee4ef9d3ba26f9dc73ef113c3d8c552b82c
font_01_sfnt_off00016b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B05 10620 bytes
SHA-256: ad30e33eb0684ea8a760972d1aad03bb2893e6f9a82f02274c064640500829fc

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