Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb6f18577746e2ce…

MALICIOUS

PDF

69.6 KB Created: 2021-02-19 19:49:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: af3a3b7ad6292806cd28454cec2103e7 SHA-1: cc39e066125985f4fb7cbc90c5166a8a9134ae98 SHA-256: bb6f18577746e2ce4e595754b38847195e67f2f35a30a19b06fe57ea1d7a4824
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it is a phishing lure and attempts to trick the user into executing commands. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though truncated and obfuscated, contains references to resetting Polycom devices, a common pretext for technical support scams. The embedded URLs likely lead to further stages of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://seumenha.ru/strik?utm_term=how+to+factory+reset+polycom+without+password PDF link annotation
    • http://opros.xyz/ladexopaloxesopedipo3ch65.pdfIn PDF document text
    • http://uplrezina.site/jemobomarapobevikabivunuku2rpr.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/fnlLkA1/32942540474.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490519/normal_600f8e2416061.pdfIn PDF document text
    • http://sedouche.xyz/bts_guidelines_for_asthma_and_copdlv8c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375528/normal_6025608c5f8c5.pdfIn PDF document text
    • http://copyrighthelp.info/87827079273umcvn.pdfIn PDF document text
    • http://bilet-pdd.site/22854982874t0sk6.pdfIn PDF document text
    • http://strahuemsya.info/hangman_game_words_easyem1kv.pdfIn PDF document text
    • http://grigolia-studio.ru/lepizupafudezuwujybmxr.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/15qotic/dekesubize.pdfIn PDF document text
    • http://souve.me/suduvubipayigkk.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/robumuduluwise/learn2serve_food_handler_training_certificate_program_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/berliner_platz_4.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/argonavis_2nd_single.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/bizzle_no_hate.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_off0000d273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD273 5552 bytes
SHA-256: 6ae9d526ee42ef49281bb440d85fb6dc913ac59e76f26204fc28848cc8c7affb
font_01_sfnt_off0000e542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE542 10428 bytes
SHA-256: 6ae701ad4e091dc5ed52f347a67273fb45c0ca30599511253e10f36fa146d57d

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