Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c27fcec63bc7be7…

MALICIOUS

PDF

189.3 KB Created: 2021-05-12 11:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6e4ffd5ec59ed3f254cf98e8505c0bdc SHA-1: d60e7cf3c97c5f55a19eb5cf7c30f49b03e00e1a SHA-256: 5c27fcec63bc7be7fd7ac161c6d4fb2352007db0a19e9dde4779ef5115329a23
166 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or credential harvesting lure. The document contains numerous embedded URLs pointing to disposable domains, many of which are part of a link farm designed to obscure the final destination. The heuristic 'SE_MFA_LURE' strongly suggests the intent is to trick users into providing sensitive information like one-time codes or MFA approvals.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://kuzutuzo.ru/strik?utm_term=the+theory+of+moral+sentiments+part+1+summary PDF link annotation
    • https://logutidukikov.weebly.com/uploads/1/3/1/3/131380383/kosorekolivitun_nasitegerofuxif.pdfIn PDF document text
    • http://komozazene.getenjoyment.net/causes_of_drug_abuse_essay.pdfIn PDF document text
    • http://lazadacostumercenter.com/what_does_biannca_prince_do_for_a_livingoljsh.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/nabigadasufutugidirunad.pdfIn PDF document text
    • http://uspeh.icu/826925855128olwy.pdfIn PDF document text
    • http://hh666o.site/fomebusaliw0lp5.pdfIn PDF document text
    • http://janexik.22web.org/68251928462.pdfIn PDF document text
    • https://xanosetad.weebly.com/uploads/1/3/1/1/131163691/9549617.pdfIn PDF document text
    • http://kefovatoxag.22web.org/anemia_hemolitica_autoinmune_en_adultos.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/tutorowebizuduvukubikoxo.pdfIn PDF document text
    • https://tesegape.weebly.com/uploads/1/3/5/3/135387632/gujagusibajeto_filud_fopobew_vutodi.pdfIn PDF document text
    • http://ratixopawem.mypressonline.com/cancer_espinocelular.pdfIn PDF document text
    • https://damasixo.weebly.com/uploads/1/3/5/3/135322107/pilorum.pdfIn PDF document text
    • https://sidusumidiwef.weebly.com/uploads/1/3/4/3/134366372/865658b5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/votawawo/warcraft_3_reforged_mit_frozen_throne.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/cisco_packet_tracer_answer_key.pdfIn PDF document text
    • http://lirifamagugo.rf.gd/53860475006.pdfIn PDF document text
    • http://zeluzara.epizy.com/fepezatafawarunefamefugu.pdfIn PDF document text
    • http://numaxap.epizy.com/public_policy_analysis.pdfIn PDF document text
    • http://juxugalipexobow.epizy.com/when_lights_are_low_benny_carter.pdfIn PDF document text
    • http://tudaket.epizy.com/carry_on_my_wayward_son_music.pdfIn PDF document text
    • http://vivetusukuv.onlinewebshop.net/limub.pdfIn PDF document text
    • http://desetezovadu.epizy.com/12610133477.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002a455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A455 5124 bytes
SHA-256: 1fd8bd1355d9068498e2aa60383333b00f6c56fe65d84534cda0165beb6b4a81
font_01_sfnt_off0002b5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B5A8 10172 bytes
SHA-256: 19c578a5d73ae5be4fe58473d4b4d7defdba4cd8a9c4460e98a057542369bc61
font_02_sfnt_off0002d879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D879 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378