Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e790af01b04084…

MALICIOUS

PDF

80.8 KB Created: 2021-05-12 20:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6d93f662a12f0e26949a904a09ac7e6e SHA-1: 3a6ea95c8bf246dcde7b897d9e5f2bf6a42a8f71 SHA-256: 54e790af01b0408475b3dbf587030b681fd095269122ff5fd285fca2b5e40647
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The document contains numerous embedded URLs, with one pointing to 'https://golowaki.ru/strik?utm_term=drums+of+autumn+plot+summary', suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of links on disposable hosting, reinforcing the malicious intent.

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://golowaki.ru/strik?utm_term=drums+of+autumn+plot+summary PDF link annotation
    • https://sesumevikenaful.weebly.com/uploads/1/3/5/3/135346106/putopomipijajag.pdfIn PDF document text
    • http://vozajomaralamer.mygamesonline.org/ain_t_them_bodies_saints_script.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491927/normal_60293fee37ceb.pdfIn PDF document text
    • http://medgaj.com/870740905514bwbx.pdfIn PDF document text
    • http://zonokiwuwagupu.getenjoyment.net/66847472638.pdfIn PDF document text
    • https://midinomuxew.weebly.com/uploads/1/3/5/3/135391973/tosar-muginowo-kitofarakekeno.pdfIn PDF document text
    • http://nextauto02.ru/stairway_to_heaven_solo_ukulele_tabdbkfn.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/chemical_lab_report_example.pdfIn PDF document text
    • http://filemarker.store/dukevipemhi9i8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_606e316943140.pdfIn PDF document text
    • http://piwofoterif.sportsontheweb.net/nejikijit.pdfIn PDF document text
    • http://wersita.fun/bd_chaurasia_anatomyni3jj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408324/normal_6008c05e16d83.pdfIn PDF document text
    • https://sulewana.weebly.com/uploads/1/3/4/6/134605909/621c57bda17a2.pdfIn PDF document text
    • https://rogetaguw.weebly.com/uploads/1/3/1/4/131407632/retidiwutojeb.pdfIn PDF document text
    • https://xowilululevala.weebly.com/uploads/1/3/4/0/134017879/jemujafoseb.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/importance_of_mathematics_education.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuwutexo.onlinewebshop.net/xokotodesimamesizaxus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40a356ae-91f6-4de6-8438-52e75964ea5b/38545498378.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7468e9d6-9833-4533-bec0-f8595bf8ac9e/99260196858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2660e79c-33dd-4302-86c5-11ccf12de33f/48426990038.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_off0000fd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD47 5148 bytes
SHA-256: 1a9c521c28bf2c904c745a9999c779e81f127c760292902e36b52634ffe36ce0
font_01_sfnt_off00010ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBE 10980 bytes
SHA-256: e483cf203255e2bfe445db5801f7069d7620375f3e1752951181b99dd0045605

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