Malicious PDF — malware analysis report

Static analysis result for SHA-256 95bd772c80d7bf28…

MALICIOUS

PDF

73.0 KB Created: 2021-03-02 00:40:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 10200ee7f2ac5c553d32336c5b332152 SHA-1: 840fdd9d2d0b1411e020588494c6deb9aa47e080 SHA-256: 95bd772c80d7bf2838e0254b292692f954e1b3360c68959408127bd79248e5bb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://lozipotod.ru/strik?utm_term=comparatif+et+superlatif+exercices+francais+pdf PDF link annotation
    • http://vuwiwetidajin.mywebcommunity.org/zozudazedagof.pdfIn PDF document text
    • http://getfreecreditreport.info/re_zero_light_novel_plotwhywm.pdfIn PDF document text
    • https://zemizipip.weebly.com/uploads/1/3/4/0/134098502/5255321.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/jPhc3gg/jelinafenifumop.pdfIn PDF document text
    • https://fezinonod.weebly.com/uploads/1/3/1/0/131070080/kixakix-tuvajafamifavaw-jozezefoxax-zarak.pdfIn PDF document text
    • https://cdn.sqhk.co/gepabafi/vhbiiic/viral_tv_shows_netflix_must_watch.pdfIn PDF document text
    • http://romabeveseruzor.22web.org/gartner_report_on_cloud_security.pdfIn PDF document text
    • https://jarosebat.weebly.com/uploads/1/3/4/6/134695718/259388.pdfIn PDF document text
    • http://raftgjgr.space/stephen_king_bibliography_in_order57sql.pdfIn PDF document text
    • http://pexawegowe.mywebcommunity.org/elements_of_writing_style_checklist.pdfIn PDF document text
    • https://cdn.sqhk.co/lekibefefu/cseheOZ/wiwugugisi.pdfIn PDF document text
    • https://satisetuxa.weebly.com/uploads/1/3/0/8/130813646/7982479.pdfIn PDF document text
    • http://suxiselukex.66ghz.com/vidmate_old_version_for_android_free.pdfIn PDF document text
    • https://gerikolobel.weebly.com/uploads/1/3/1/3/131398187/5f62cf1792f8.pdfIn PDF document text
    • http://bet-info.ru/rejevebekofugur9c9s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vejegaba.atwebpages.com/canon_mx922_user_manual.pdfIn PDF document text
    • http://lelekon.epizy.com/79525210774.pdfIn PDF document text
    • http://sisizovomejefi.epizy.com/bedupofulaku.pdfIn PDF document text
    • http://sulorowanutabu.atwebpages.com/black_and_decker_workmate_type_1_spares.pdfIn PDF document text
    • http://xovurilarilowi.epizy.com/how_to_clean_aeroccino_milk_frother.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_off0000dcbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBD 5272 bytes
SHA-256: 8fa817f467ba8974427f9075165c165d034e92f3a2bcd32d78486bbe2f6535e4
font_01_sfnt_off0000ee95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE95 11832 bytes
SHA-256: eaef63824797fc4ccd42d09165d07ff32c72c607e039a8bf68ca5891fdfbccbb