Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9dcb87a8c077f51…

MALICIOUS

PDF

77.0 KB Created: 2020-12-30 04:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9047ac0d1f808df543511cad86f180ed SHA-1: 75a52049b03a5b2400ca7ccb53f00e39b1b58a9b SHA-256: a9dcb87a8c077f511526bfb299a5f73f2f4598ffa40e82ffbbbcd923ad3bad82
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it uses lures related to clipboard command execution and password-protected archives, suggesting a phishing or credential harvesting attempt. The embedded URL points to a suspicious domain, likely serving as a download or redirection point for a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/123?utm_term=red+kote+autozone
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f9cb893c594b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tiniruru/fopuzexetulopusejeki.pdf
    • https://uploads.strikinglycdn.com/files/2f07fbcc-a802-4e3d-9c0b-1cc37fadbf79/ghost_recon_wildlands_achievement_list.pdf
    • https://s3.amazonaws.com/waxapoz/76790307893.pdf
    • https://s3.amazonaws.com/tokatefozude/best_free_bedside_clock_app_android.pdf
    • https://uploads.strikinglycdn.com/files/27e98b60-6ac2-47f9-9456-feb631996b29/jedirozip.pdf
    • https://s3.amazonaws.com/betefowubevat/arere_avala_naguvu_kannada_song_free.pdf
    • https://uploads.strikinglycdn.com/files/6d76d0bd-d893-4f0e-a6e4-ba2561733a90/naruzi.pdf
    • https://s3.amazonaws.com/kudufigunabi/toxud.pdf
    • https://s3.amazonaws.com/nodetuxapabara/commutative_associative_identity_property_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/be902501-3ba9-447e-b933-1abf4672b640/knowledge_questions_about_ethics.pdf
    • https://uploads.strikinglycdn.com/files/2077f80b-ddd0-4de0-8753-789a7f0f69f9/44373720380.pdf
    • https://s3.amazonaws.com/tibanepoxilibud/zezepopugujolisiwelupib.pdf
    • https://uploads.strikinglycdn.com/files/a924834c-711b-4b89-a6a5-c4a5db3c4867/google_chrome_recover_previous_session.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e86d.bin
6d4deea37226b2ae6e3a56dffadbfe3e2df40ca21f5be53bc4c1b78e759dec2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE86D 3148 bytes
font_01_sfnt_off0000f3a7.bin
2032f07e7cc3d67c5aaef61d2e3f6185d3deb59c93782db88a746cb7a33c25b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A7 4636 bytes
font_02_sfnt_off0001038e.bin
22eed3a31a4d866be1f7702f8f4d849ed1941c7022895316d17216483e7392fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1038E 10412 bytes

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