Malicious PDF — malware analysis report

Static analysis result for SHA-256 aefe186fa203355e…

MALICIOUS

PDF

79.1 KB Created: 2021-02-14 01:53:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44a1f21d660fae4e36efd35d04f7fa82 SHA-1: 9acbb42ded1fc3a7c0529c379326bcf37e1c3229 SHA-256: aefe186fa203355e4f31f9a8d62dd31d8959d2b1f47098b6ba746aedcb304383
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a link farm detection and a high ML classifier score. It contains numerous external URIs, with one pointing to a suspicious domain 'seumenha.ru'. The presence of many external links suggests an attempt to redirect users to potentially malicious websites, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=is+pinnacles+youth+park+open
    • http://klossheff.xyz/tofawesuxasaraxetulatep71ju7.pdf
    • http://itawegan.fun/valentine_day_week_list_imagefq781.pdf
    • http://1pokypki.website/nusilugilejoj35pbn.pdf
    • https://suxaniwaxunese.weebly.com/uploads/1/3/4/3/134385499/8527085080d.pdf
    • http://creditscoretracking.info/a_b_c_d_song_naakqzrg.pdf
    • http://hookup154.online/fimenufatenwioe6.pdf
    • https://cdn.sqhk.co/vizakifito/hfjfR5F/cutie_garden_game_review.pdf
    • https://bebotarusi.weebly.com/uploads/1/3/1/4/131454771/zalurijupikudafopax.pdf
    • http://bathforlegs.xyz/joregiripigurqpi55.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/radubozufiwo/76275792331.pdf
    • https://s3.amazonaws.com/bokelur/bavipaxubagugevegula.pdf
    • https://s3.amazonaws.com/donake/zijuvukal.pdf
    • http://rawuvotatu.rf.gd/43794192143.pdf
    • https://s3.amazonaws.com/wiremeresegikon/harry_potter_theme_sheet_music_piano_easy.pdf
    • http://lolefijulakemi.rf.gd/coreldraw_full_version_with_crack.pdf
    • http://pujixedigegogup.epizy.com/agents_of_socialization_family.pdf
    • https://s3.amazonaws.com/jaloto/75096947448.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_off0000f9d9.bin
941a9c454d7e12c0c6a8104e5d4f7786499386a1b0e8e973df16fc6e23d7875c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D9 5124 bytes
font_01_sfnt_off00010b46.bin
39d74f5e27246104bd8b21b5bea5415ffe10d9b21d7454c0f12c014a30b373ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B46 10532 bytes