Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fbd1524daa5d498…

MALICIOUS

PDF

82.3 KB Created: 2021-05-03 21:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5c6e3a0fa008e8fd9b075fe2a7e3b085 SHA-1: 2bdcf67c5b9bb10423b1b9d20062137318716b04 SHA-256: 5fbd1524daa5d498f2276bd73c9a16d614b7d03d6be4d86a01346e1dda743a18
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI that redirects to a URL designed to appear as a search result for a common query. This is a common phishing tactic to trick users into clicking malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://vilenefex.ru/strik?utm_term=how+do+you+turn+off+a+nintendo+switch+pro+controller PDF link annotation
    • http://sarkife.site/dragon_gourmet_grafton_wi_530241gvg1.pdfIn PDF document text
    • http://sixegonupujuj.22web.org/latuxixapufet.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/iaLk7DV/lutokonozivonoronuve.pdfIn PDF document text
    • http://spoonnumberone.xyz/xasirokegogip50nxd.pdfIn PDF document text
    • https://jepirozo.weebly.com/uploads/1/3/4/4/134474462/katedebigisosa.pdfIn PDF document text
    • http://rankingcoach-seo.com/80477973392rgfy2.pdfIn PDF document text
    • http://regse.website/carbide_create_softwarey2hoa.pdfIn PDF document text
    • https://cdn.sqhk.co/sojetaji/W2yEFgi/poor_digestion_medical_term.pdfIn PDF document text
    • http://art-practice.org/zewurederinowisitokup4azc9.pdfIn PDF document text
    • https://cdn.sqhk.co/kigimole/RMJ5kid/jekudobekudedulelatasumi.pdfIn PDF document text
    • https://xidazujagavoza.weebly.com/uploads/1/3/1/4/131453269/bb2a25c.pdfIn PDF document text
    • http://wownatural.fun/68745860451aur56.pdfIn PDF document text
    • http://getallcreditscores.info/4844316802x5tpp.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/1jhif0p/juminubivamiminarizavadi.pdfIn PDF document text
    • http://xeresorejal.iblogger.org/80842158071.pdfIn PDF document text
    • http://richmaya.site/yayati_kadambari_freef4y6s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ladisopezaxak.epizy.com/munafupamarevebej.pdfIn PDF document text
    • http://bapifodog.epizy.com/babel_full_movie_300mb.pdfIn PDF document text
    • http://dupumimegijema.epizy.com/acgih_tlv_2020.pdfIn PDF document text
    • http://bosabesebomixeb.epizy.com/teoria_del_aprendizaje_cognitivo_social.pdfIn PDF document text
    • http://xigitada.rf.gd/characteristics_of_bureaucratic_management_theory.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_off0000fa20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA20 5396 bytes
SHA-256: bdabb743f745be810a14f28b22471fa684c1efbc55f451062c9822fe0008a201
font_01_sfnt_off00010c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8E 14812 bytes
SHA-256: 181be7e0ec0f4bff20ce23062f2c3f3cff5dc01890192b856fa51358bd4927a0

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