Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a64a5dcd9315684…

MALICIOUS

PDF

73.4 KB Created: 2021-03-07 07:52:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 046deca21e058dc47dc019b4a84e7ff0 SHA-1: d53ce26e9ae09620ac24bf1df6a79827da1c70a0 SHA-256: 2a64a5dcd93156849305fd4c8a3e5d6203dde5c500006a1f76ce1c3f01b8c788
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1553.005 Antivirus Software Disabled

The PDF document contains heuristics indicating it is a link farm and a lure to execute commands, instructing the user to disable security software. The embedded URLs and the ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the document body's content and heuristics point to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://zajinet.ru/123?utm_term=kenmore+oasis+he+ld+error+code PDF link annotation
    • http://palikexifumalam.mywebcommunity.org/convert_ft3_to_m3_gas.pdfIn PDF document text
    • http://my-favshopf.online/bharti_axa_two_wheeler_insurancevxinv.pdfIn PDF document text
    • https://xowogibudul.weebly.com/uploads/1/3/4/4/134446034/02bf520.pdfIn PDF document text
    • http://kevufeduwatawos.mypressonline.com/tamezegunabaxisisifuxela.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/mufiw.pdfIn PDF document text
    • http://budivev.scienceontheweb.net/wixuzudepus.pdfIn PDF document text
    • http://topplafond.xyz/bill_james_baseball_abstract_1984jmbtr.pdfIn PDF document text
    • http://sqrab.top/8417691731c40h1.pdfIn PDF document text
    • http://gopikosumusaroj.22web.org/lukijugitobirasuwuliga.pdfIn PDF document text
    • http://coolmag.biz/banakojowijert7mtl.pdfIn PDF document text
    • http://repair-kvadrokopterov.ru/10075133030090pb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giwinilugo.epizy.com/what_is_the_average_amc_10_score.pdfIn PDF document text
    • https://e06e8306-d71e-4c92-aa1b-e8c52eeb44cb.filesusr.com/ugd/bc4951_0c6fb0ee627e4d4798d9fd6c8ffbf8c4.pdf?index=trueIn PDF document text
    • http://niwimugosaz.onlinewebshop.net/78229167799.pdfIn PDF document text
    • https://587b455d-cc79-4428-8e80-a8b75ce23bca.filesusr.com/ugd/021ec8_868d0dde09cb4973b7d25269a16bc1c8.pdf?index=trueIn PDF document text
    • http://lerofisa.epizy.com/manually_add_workout_apple_watch_4.pdfIn PDF document text
    • http://zemufobure.rf.gd/mitezexiluliwebizuz.pdfIn PDF document text
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_c265addc6da04eb8930ca0e47120a010.pdf?index=trueIn 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_off0000e338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE338 5148 bytes
SHA-256: 0e88316c97bdf866bef569874c698295099a1295013c9b7598c41e0ff50677b9
font_01_sfnt_off0000f48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48F 10600 bytes
SHA-256: b64aa05660c0c0d308a0f03819bda907e01ef3c0135394a0775c5914e419bd5b

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