Malicious PDF — malware analysis report

Static analysis result for SHA-256 a46b45941f40aed9…

MALICIOUS

PDF

81.6 KB Created: 2021-03-18 21:02:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7e6da0ddbd3285291bf3cd7768370b98 SHA-1: 3d62a10b4a6592b2a98d8e23612f9614a60fe726 SHA-256: a46b45941f40aed9918bf2a0038858b68ce8b079cfebe1c5bc855ec6dbdc680d
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to potentially malicious or disposable domains, flagged by heuristics for malicious redirectors and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to harmful content, likely as part of a phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://crophysi.ru/award?keyword=eye+test+color+blind+chart+pdf In PDF document text
    • http://rirelavemug.iblogger.org/ketefoloma.pdfIn PDF document text
    • http://startask.ru/54010138694mgo2b.pdfIn PDF document text
    • http://pesisasije.22web.org/66934421541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453891/normal_6013d947c4131.pdfIn PDF document text
    • http://towudunef.22web.org/embroidery_stitches_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/D42gdjd/personal_shopper_jobs_austin.pdfIn PDF document text
    • http://allerlo.xyz/romeo_y_julieta_habana_reserve_titanp4g3a.pdfIn PDF document text
    • https://cdn.sqhk.co/kifateten/3iaDbhb/nfl_scores_week_5_espn.pdfIn PDF document text
    • https://cdn.sqhk.co/lixijadimit/WSRjehc/rangers_of_oblivion_android_review.pdfIn PDF document text
    • http://wukosemat.22web.org/12246788580.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/ljhtIVJ/8334583711.pdfIn PDF document text
    • http://berkeciftci.net/62939664133j4n5.pdfIn PDF document text
    • http://dogisutuzise.22web.org/15880683353.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470977/normal_60290f2027236.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lunijikujapike.epizy.com/cartoon_network_movies_in_tamil_free.pdfIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_f868f97bd54346448c886662bd6ed37f.pdf?index=trueIn PDF document text
    • https://a179b4bb-f9e1-4b0b-8685-f881d2afde68.filesusr.com/ugd/0fdb6d_1d2467d659fa41f7bf3852da47ecaed1.pdf?index=trueIn PDF document text
    • http://gunubepixel.epizy.com/xazulefemirugol.pdfIn PDF document text
    • https://18cceff7-6d50-42ec-9d85-67184b61345e.filesusr.com/ugd/8c2e83_f6bd81f728b34b29a169d32b69d315a4.pdf?index=trueIn PDF document text
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_9a3b6d56d0674c33b5c7986d0be9cac5.pdf?index=trueIn PDF document text
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_55191cb5570a4918848e056abfc233aa.pdf?index=trueIn 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_off0000fe50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE50 5440 bytes
SHA-256: 9c825af611b0b06608f492eb502ca1a50d19cca968c72a740fe1aa9fe15d9a83
font_01_sfnt_off000110d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D1 11596 bytes
SHA-256: fe674fbbd57d27aa2259712da1b1a0542f9c9d4e3cdd1f096174820aa4bd2671

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