Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5408103c4a0110e…

MALICIOUS

PDF

65.4 KB Created: 2021-02-26 11:14:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 59ac479933d9c0381d6082025a628aa6 SHA-1: 2f72830458eed5dbbba084ac1964ecd6a5063f3f SHA-256: e5408103c4a0110ed113a69a75dac9d277b977fc9bf4ffd3d1c95d0225ca8d42
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, identified as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing malware. The primary function appears to be redirecting users to other potentially harmful PDF documents hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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 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
  • 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://dafemum.ru/award?keyword=10+day+smoothie+cleanse+pdf+free PDF link annotation
    • http://legendarycraft.ru/wedubovjyeq0.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/vezozomuxezuka-kitet.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/zujerixewewu.pdfIn PDF document text
    • https://cdn.sqhk.co/duwokarewesu/ggfgjpE/killer_bean_unleashed_movie_download.pdfIn PDF document text
    • https://kirenokasanav.weebly.com/uploads/1/3/4/4/134445236/kabunotuzaw_purubizunix_xekaw.pdfIn PDF document text
    • https://litepuvib.weebly.com/uploads/1/3/4/7/134741427/2086691.pdfIn PDF document text
    • http://buytoday.cc/pexawipuxesazafajawu5cn5c.pdfIn PDF document text
    • https://jajadonafusava.weebly.com/uploads/1/3/4/0/134040597/gelozelenamuji.pdfIn PDF document text
    • https://naxofezuwu.weebly.com/uploads/1/3/5/3/135396878/nekubupudokakot.pdfIn PDF document text
    • https://xufujakuzizam.weebly.com/uploads/1/3/5/3/135315974/febitukigago.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/sutolofilunewa-tupukom-talibezumidu.pdfIn PDF document text
    • http://damvglaz2.xyz/kausalitas_dalam_sejaraht5r4b.pdfIn PDF document text
    • https://tupodoki.weebly.com/uploads/1/3/0/7/130776149/bca742.pdfIn PDF document text
    • https://cdn.sqhk.co/fewibefanid/QRDidib/family_mysteries_poisonous_promises_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/ephcggZ/ac_dc_ampere_meter_price_in_pakistan.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/Le42ic1/high_school_texas_baseball_scores.pdfIn PDF document text
    • https://jetosiwer.weebly.com/uploads/1/3/4/7/134767378/f38e4295258fd.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/jhdHI5t/absorption_spectroscopy_graphene.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF68 5596 bytes
SHA-256: 8db207443b0055f7a5fd3454335cff102014b2e87e91a1115785fd2cadeae6c9

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