Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d599d51a311f3c…

MALICIOUS

PDF

96.2 KB Created: 2021-04-07 04:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 16b23547202dcc41bee098d12b57b6fc SHA-1: 69d192a0a3993b66bcd103703e1416223b7c3052 SHA-256: 01d599d51a311f3c8ec7ef4df54efeb04b7a2393a2acda3a0244c80c716672a8
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains references to 'online pdf' and appears to be part of a link farm designed to redirect users to various external URLs. The presence of 'cmd1js.pdf' in the heuristics suggests potential JavaScript execution, which is commonly used in PDF exploits to download and execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://dugedepap.ru/award?keyword=alcor%25C3%25A3o+online+pdf PDF link annotation
    • https://cdn.sqhk.co/tejilunuf/5jihcha/tudub.pdfIn PDF document text
    • http://hookup671.site/piwuzajeviladubopws8q.pdfIn PDF document text
    • https://kelonefak.weebly.com/uploads/1/3/2/6/132683111/de5d4b377e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465941/normal_602ae6e1c0cc0.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/fc6a02f6cc7fba9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_602ea67651cf4.pdfIn PDF document text
    • https://cdn.sqhk.co/jobezivozuf/dMicjcx/77372849906.pdfIn PDF document text
    • https://wudujadulaneg.weebly.com/uploads/1/3/0/7/130738887/guvijalanafavo.pdfIn PDF document text
    • https://cdn.sqhk.co/toxodabatot/BTyjiGt/68661041220.pdfIn PDF document text
    • https://cdn.sqhk.co/gubisagebuto/thcazpk/charades_for_kids_generator.pdfIn PDF document text
    • http://igcopyrightverify.com/essay_topics_for_class_10_icse_2017cc4yo.pdfIn PDF document text
    • https://daxixulo.weebly.com/uploads/1/3/1/0/131070202/wiwavorazinilusek.pdfIn PDF document text
    • http://prodive.su/jesagateln5i8x.pdfIn PDF document text
    • http://kekewawoxugar.sportsontheweb.net/vikowakovonoporizuro.pdfIn PDF document text
    • https://cdn.sqhk.co/jafetegupam/VgfP9kM/logo_barbershop_vectoriel.pdfIn PDF document text
    • http://moneymaya.site/when_to_do_fallout_4_dlcmd1js.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/what_is_the_point_of_view_that_a_personal_narrative_usespyap8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452607/normal_6056b7a53a8ec.pdfIn macro / runtime command snippet
    • https://vomilanusasapik.weebly.com/uploads/1/3/4/4/134478463/9000478.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/what_is_thIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://satogitexuvo.myartsonline.com/all_aptitude_formulas.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/xabigo.pdfIn PDF document text
    • http://nubibubimalepik.atwebpages.com/takibepukubox.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/36709049644.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_off000102ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BA 17220 bytes
SHA-256: 5a22492ff968dd8645a64e4e757ecbf5ff83c2cff2d6fb598f0a76d6dad74865
font_01_sfnt_off000139d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D7 5068 bytes
SHA-256: 3bc0ccec73603ce6c561b14a1254c3853e553b36e51a20701931b166ecaa3148
font_02_sfnt_off00014b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B1F 11264 bytes
SHA-256: a9d053bc9981207ba2eb205dc1a1f25ed9a99f44af86856b315b4329f3add848