Malicious PDF — malware analysis report

Static analysis result for SHA-256 04165e5245769fb1…

MALICIOUS

PDF

81.0 KB Created: 2021-05-16 00:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 88a680f8dd9a1f301360ecdccbaa682c SHA-1: 273a58a03204c17df2660cb0ecff8938c7443e13 SHA-256: 04165e5245769fb1eeabb4b8952b54a46e5aafb96023256ff859377587247fc5
166 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple disposable domains, including 'soxebez.ru'. The presence of 'cmd_commands_tutorial.pdf' in the document text suggests a pretext for luring users to these sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/strik?utm_term=ways+to+explain+sunrise PDF link annotation
    • https://mokazeke.weebly.com/uploads/1/3/1/3/131384082/d5a5ca09ed9b4d.pdfIn PDF document text
    • http://kafikiwamavo.22web.org/sidab.pdfIn PDF document text
    • https://jinokafolamod.weebly.com/uploads/1/3/4/3/134310646/kiwevizikog.pdfIn PDF document text
    • http://seruvirokanajo.iblogger.org/windows_cmd_commands_tutorial.pdfIn PDF document text
    • https://mabavelege.weebly.com/uploads/1/3/0/7/130775551/rimometivawi_vopikedubipob_warupu.pdfIn macro / runtime command snippet
    • http://xitodefigatefuj.medianewsonline.com/thermo_scientific_lindberg_blue_m_water_bath.pdfIn PDF document text
    • https://jepejopik.weebly.com/uploads/1/3/4/6/134610321/lamoluterug-buroresotopa-vojelelevok.pdfIn PDF document text
    • https://dijujuvosidig.weebly.com/uploads/1/3/0/8/130873718/9502431.pdfIn PDF document text
    • http://ditoterelutas.sportsontheweb.net/ignou_admission_2020_20.pdfIn PDF document text
    • http://runexedagig.iblogger.org/pioneer_sph-da210_manual_en_espaol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sitok/lofugifizatigudedole.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/rukosujelekonozudejisizab.pdfIn PDF document text
    • http://mowiredeponup.rf.gd/17455228403.pdfIn PDF document text
    • http://vufilupirudote.rf.gd/93521664089.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/jijolefexamagad.pdfIn PDF document text
    • http://jopiwutiz.epizy.com/machine_learning_algorithms_and_applications_book.pdfIn PDF document text
    • http://rujipezoj.epizy.com/dark_alliance_baldurs_gate_ps2.pdfIn PDF document text
    • http://vuzudaru.epizy.com/coreldraw_latest_version_free_filehippo.pdfIn PDF document text
    • http://dololesorut.epizy.com/16128534694.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/pujosatevi.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/sozumumotoxufejimep.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/personal_branding.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
    • https://s3.amazonaws.com/zazelujejIn macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D4 4996 bytes
SHA-256: df096c0164a78f18b243c37be8f820b5c9b3a7164b2cb3bc2c09d83d5af6b6ca
font_01_sfnt_off000111f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F5 10824 bytes
SHA-256: 709b269769c67388df6d58d97168996b02e4cc0e2ef376bddb2468b2ece59030

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