Malicious PDF — malware analysis report

Static analysis result for SHA-256 019a1f7dff721213…

MALICIOUS

PDF

80.2 KB Created: 2021-03-14 23:51:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 135f3974b2e2c6ca79aa419944316aba SHA-1: 41e1ba61a64295e4697e5141c4b1e43ceb4d7f04 SHA-256: 019a1f7dff721213c682c9380acd41e3c3c288f15c2bc01bfbe7cf3dc5cc9fca
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the presence of a browser extension/update installation lure and a visual download button, suggesting a social engineering attack. The embedded URL points to a suspicious domain, likely used to host or redirect to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://soxebez.ru/wix?keyword=save+google+doc+as+png
    • http://nerazegizetikam.getenjoyment.net/jukedanujedir.pdf
    • https://cdn.sqhk.co/sazelusup/Shjgey0/bidovarezawaresadufujore.pdf
    • http://jaxagogilexet.sportsontheweb.net/how_to_turn_on_weber_grill_spirit_2.pdf
    • https://cdn.sqhk.co/zanotunuzi/KhidjbS/drive_in_movie_theatre_virginia_beach.pdf
    • https://cdn.sqhk.co/xutazazo/pKbFihi/kutisekalawag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5f8b0e40-2141-4341-98ab-6145db4b8156.filesusr.com/ugd/2072cd_f0f9371172294b65aadfcba13da06b03.pdf?index=true
    • https://s3.amazonaws.com/jebokizez/amazon_android_app_store_apk.pdf
    • https://uploads.strikinglycdn.com/files/7ad7f18c-3d4e-43f6-bc99-25057baf60fe/19904358242.pdf
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_08079182991a45c3815e57b561e59858.pdf?index=true
    • https://s3.amazonaws.com/jupoti/belly_dancer_akon_music.pdf
    • https://s3.amazonaws.com/zupenafud/colonic_polyps_guidelines.pdf
    • https://uploads.strikinglycdn.com/files/bccb57b9-35af-4d5a-8b6c-a68659ef58b3/vinyl_wall_art_instructions.pdf
    • https://s3.amazonaws.com/bofake/triangle_angle_bisector_theorem_worksheet_doc.pdf
    • https://s3.amazonaws.com/sezebepit/svuotare_cestino_android_8.pdf
    • https://uploads.strikinglycdn.com/files/0ebc5efc-cc97-4f11-911a-b29dac5b62fb/tropical_rainforest_description.pdf
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_dc69001193cd4d8b92046dfd950ec9dc.pdf?index=true
    • https://s3.amazonaws.com/semuxemakaw/20786538594.pdf
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_ee0f7e247b1642daba82d229e30ebb6c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/610f31cc-b7d9-4151-956a-419c357fc32b/vodubewalujatobepota.pdf
    • https://uploads.strikinglycdn.com/files/0acd0741-47bf-473e-9fee-51622d98dba0/what_do_teenager_do_for_fun.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e623.bin
0b9d5318795d4eab173363ff0a376a0190c6b8ec3069fa7e57dd81d9d8d6b73d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE623 5308 bytes
font_01_sfnt_off0000f84e.bin
a5076d5b55904782e9806aa4be0274dede5f3c8d11ad97bc7ab1b0bfd81f018e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF84E 11064 bytes
font_02_sfnt_off00011e52.bin
9d161d6e34f835aff196e226d852edde4d65b072a4902c32411b177d8c29261e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E52 16076 bytes

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