Malicious PDF — malware analysis report

Static analysis result for SHA-256 982f710e9ac48fec…

MALICIOUS

PDF

73.0 KB Created: 2020-12-25 14:25:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 899f8a2b28f657496d0c49e0fd359f08 SHA-1: ba9ffd321ab0469ba9a4b0d5a87e662efd2d6eb9 SHA-256: 982f710e9ac48fecf7c3dbb60532252fdf5ea0982301e00a918e6293372cc122
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and it contains an embedded URI pointing to a suspicious domain. The document body, though heavily obfuscated, contains strings that suggest it is a PDF document. The presence of an external URI indicates an attempt to redirect the user to a potentially malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/strik?utm_term=null+vector+of+zero+matrix
    • https://static.s123-cdn-static.com/uploads/4416932/normal_5fc4a5b2cc643.pdf
    • https://cdn.sqhk.co/pibegufuxova/dXIuIia/nyan_cat_lost_in_space_descargar_pc.pdf
    • https://cdn.sqhk.co/jekuzedu/bgefjdl/64211764731.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/9ece29ad-2315-491d-9006-d4fc30032ecd/25572990454.pdf
    • https://s3.amazonaws.com/vixuwogetiv/nuclear_chemistry_worksheet_k_answers.pdf
    • https://uploads.strikinglycdn.com/files/faef34fb-2886-4422-a525-1e50115d2e99/27929904326.pdf
    • https://uploads.strikinglycdn.com/files/2fd4fe79-b776-44b0-886f-8ebd816be2ad/vejatuziratevumefili.pdf
    • https://s3.amazonaws.com/fosagoba/5230877330.pdf
    • https://uploads.strikinglycdn.com/files/b07a4e4a-c3d1-4d1c-9180-b6a0d744592d/47812156787.pdf
    • https://uploads.strikinglycdn.com/files/c57ac26e-f614-4dc7-85c4-80b6658281e5/15298396515.pdf
    • https://s3.amazonaws.com/bejikefowu/most_graphics_intensive_android_games.pdf
    • https://uploads.strikinglycdn.com/files/a88b2eea-1885-4854-a1e6-38ddeedcb28b/bozusevadavokox.pdf
    • https://s3.amazonaws.com/gifiz/codex_warhammer_40k.pdf
    • https://uploads.strikinglycdn.com/files/ca1775b3-8363-4682-b39a-1642486b93fd/mobaxagusadukupokuwugujew.pdf
    • https://s3.amazonaws.com/tuxenipup/comic_collector_guide_app.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b216.bin
0d7ef8d3b038e1d186d0133c6b51fb9e8bfb42ed3638e49a36994844173ebd48		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB216 4772 bytes
font_01_sfnt_off0000c25c.bin
b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC25C 3720 bytes
font_02_sfnt_off0000cdbf.bin
84f25d9b901081327c8207127eb164e5c86828622b8ceb156cf314361a26adfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBF 10828 bytes
font_03_sfnt_off0000f329.bin
fb10e5badbbf29d6a05184c763452604a6d256f7c208a2bb674868c670b14a78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF329 16144 bytes
font_04_sfnt_off00010824.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10824 4324 bytes

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