Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5ce12933aacb199…

MALICIOUS

PDF

73.4 KB Created: 2021-02-14 13:11:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 8d4cb2f27dfd35255025ad1b9007e4da SHA-1: 0c186a0c2a104b3cfca1bcea0cdaa6e4b7c478e1 SHA-256: a5ce12933aacb199746f3ac7cf1cde806cf66bcb77190a0544772eaef241346c
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing a large number of external URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO spam. While no scripts were directly extracted, the PDF structure itself facilitates the redirection to numerous suspicious domains, suggesting an attempt to lead users to malicious content or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://leonvi.ru/aws?utm_term=michelin+guide+dc+bib+gourmand PDF link annotation
    • https://cdn.sqhk.co/bugininaxi/Uijjijh/my_mp4_movies_online.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/IJLhchg/wish_you_were_gay_claud_guitar.pdfIn PDF document text
    • https://lasebotoxuxuxir.weebly.com/uploads/1/3/4/7/134729765/kiwetibevoluza.pdfIn PDF document text
    • https://nogonosexenepe.weebly.com/uploads/1/3/4/6/134674491/8375259.pdfIn PDF document text
    • https://tuwebuliwarukor.weebly.com/uploads/1/3/5/4/135400964/kekidesot.pdfIn PDF document text
    • https://tevoletefe.weebly.com/uploads/1/3/1/6/131606261/62e56d4.pdfIn PDF document text
    • https://newavutija.weebly.com/uploads/1/3/1/8/131871734/73d592810.pdfIn PDF document text
    • https://febufovita.weebly.com/uploads/1/3/4/3/134324671/6227192.pdfIn PDF document text
    • https://cdn.sqhk.co/rivitovolu/egjKUG0/champaign_social_work_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/gilvGhf/fakenasuli.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutesilo/fWp9KaZ/pufitalafu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jidojig.epizy.com/50232452823.pdfIn PDF document text
    • http://rotikozezusigis.rf.gd/cartoon_love_song_short_video.pdfIn PDF document text
    • http://mozifawa.rf.gd/viliwatisaxuti.pdfIn PDF document text
    • http://legosipado.rf.gd/erased_op_sheet_music.pdfIn PDF document text
    • http://mabukivo.epizy.com/woxozepasofasozifosekigip.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_off0000e246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE246 5320 bytes
SHA-256: 349685e7c07ed95356f4cfefa887a87910cde2f592d069ae1b62257ca2365abb
font_01_sfnt_off0000f437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF437 10812 bytes
SHA-256: 7a3ee35d7b71b99dcefb236edfabd344f4f344a95f7864c7285641292d615c3e

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