Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df12ff9fe86ee1a…

MALICIOUS

PDF

85.0 KB Created: 2021-03-15 10:09:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c458696a06e944e3ed3ec256887951b6 SHA-1: e668ff5f841d036dad1f2152626f78d7e2d5c674 SHA-256: 1df12ff9fe86ee1a6b9c200f094e1ce960cb99c73985b79931975348ad43a5e5
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to S3 buckets and other domains, suggesting a link farm or SEO poisoning tactic. The primary URL, 'https://soxebez.ru/wix?keyword=ffxiv+gold+saucer+fashion+report', is presented as a search result, likely to trick users into clicking and potentially downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/wix?keyword=ffxiv+gold+saucer+fashion+report
    • https://cdn.sqhk.co/lexaxemiji/ii6GihY/29566093002.pdf
    • http://rivepozepuxar.mywebcommunity.org/mowok.pdf
    • https://regujimupakuve.weebly.com/uploads/1/3/5/3/135348903/gudenerusuranif_mofudoxale_ramukegogovuw_bumeminafu.pdf
    • https://munerojepoges.weebly.com/uploads/1/3/4/0/134042508/nowokebakemu.pdf
    • https://vubisurajoguv.weebly.com/uploads/1/3/4/2/134265568/tisunukiwutobifime.pdf
    • https://cdn-cms.f-static.net/uploads/4380674/normal_604aa18531b1f.pdf
    • https://dununatanag.weebly.com/uploads/1/3/0/7/130775655/4732446.pdf
    • https://cdn-cms.f-static.net/uploads/4446399/normal_5fd2d436e8cd0.pdf
    • https://cdn.sqhk.co/tapowifilez/gRqlZeT/orchestra_instruments_worksheets.pdf
    • http://tapozifokun.mywebcommunity.org/are_disney_world_fireworks_cancelled.pdf
    • https://static.s123-cdn-static.com/uploads/4462075/normal_5ff7720219410.pdf
    • https://cdn.sqhk.co/petawelesup/gFhfnrQ/91827366834.pdf
    • http://tupaxeguna.scienceontheweb.net/72862191397.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gapivegek/logitech_extreme_3d_pro_review_2020.pdf
    • https://s3.amazonaws.com/pusori/mevojajufosede.pdf
    • https://s3.amazonaws.com/suxuzubojut/summarizing_paraphrasing_citing_synthesizing.pdf
    • https://s3.amazonaws.com/lukepepe/kowakomavirobazuzofema.pdf
    • https://s3.amazonaws.com/zoromexemuzid/michelin_guide_london_hotels.pdf
    • https://s3.amazonaws.com/wibedubosateg/atrial_arrhythmias.pdf
    • http://povodakav.myartsonline.com/ar_rahman_surah_download.pdf
    • https://s3.amazonaws.com/zuguvoxoki/82453961531.pdf
    • https://s3.amazonaws.com/piradi/par_quoi_commencer_meaning.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cd9.bin
8c04a6d973432aed40e1e547c30c7fa206080f4db61d326ab4b74e88d071fa76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD9 5500 bytes
font_01_sfnt_off00011fa0.bin
7e6b75a72d4b604c832a4afb497cda2e90432ee8cdff22ce66c1932b4158f11f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA0 11516 bytes

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