Malicious PDF — malware analysis report

Static analysis result for SHA-256 abec82244074450c…

MALICIOUS

PDF

78.3 KB Created: 2021-03-27 23:29:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9ee82344f7d0fea1906db05828736d0 SHA-1: 78d6fb50eff7aa30fa1eab23aa502560e81428f4 SHA-256: abec82244074450c5b26749c61c41e99c289ed203c933da5110bd20680aebf7f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=create+piano+sheet+music+online+free
    • http://luwogexejel.getenjoyment.net/97205247699.pdf
    • http://jexekiraj.sportsontheweb.net/xokizidosonadek.pdf
    • https://static.s123-cdn-static.com/uploads/4419629/normal_5fe39d260eab1.pdf
    • http://nazorizuz.medianewsonline.com/boost_juice_menu.pdf
    • http://dujegud.getenjoyment.net/sdgs_agenda_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4402481/normal_601d76f40d946.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://guvetevuvov.epizy.com/moguriduvokuxulux.pdf
    • http://tufebogepamik.rf.gd/chakra_books_for_beginners.pdf
    • http://naburonip.myartsonline.com/how_to_edit_text_in_nuance_power_advanced.pdf
    • http://tutazena.epizy.com/49677840459.pdf
    • http://vekubuj.rf.gd/texilekinivepupexupido.pdf
    • http://fekofenuxekit.rf.gd/63811061572.pdf
    • https://s3.amazonaws.com/wonumafubij/rinifalugobibamiwas.pdf
    • http://zibakogemigana.rf.gd/convert_worksheet.pdf
    • http://xuvugezizitowu.rf.gd/12941491634.pdf
    • http://ketaxesam.epizy.com/slayer_leecher_no_virus.pdf
    • http://tejugelomuw.rf.gd/chicken_invaders_3_xmas_multiplayer.pdf
    • http://watenuzigoxabi.rf.gd/33820186989.pdf
    • http://wifofevowogak.onlinewebshop.net/pesiw.pdf
    • https://s3.amazonaws.com/nijosinizo/21319562544.pdf
    • http://bujijawuta.atwebpages.com/anganwadi_application_form_in_tamil.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_off0000f4e2.bin
294b9e557c09b5a8b2e6d895d96f30f65424db62b3ec563720835dee926ee562		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E2 5160 bytes
font_01_sfnt_off00010643.bin
958b4ac216b725fa81379dd423a9c69b96b4093ec83085652fe15b49eafd3045		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10643 10944 bytes

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