Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9ef1bdd43d691f…

MALICIOUS

PDF

106.4 KB Created: 2021-03-18 11:59:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41f036b5cd83a7c5739fcd7f69fa28ca SHA-1: 29684a684cdd48896b1b5e0c861c38c390cf2393 SHA-256: 3c9ef1bdd43d691ffade2d78c852737944ef0b215e530a8ce916123fdc42d8b2
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended to lure the user into downloading a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/123?utm_term=breeding+guppies+pdf
    • http://leaninrzpd.site/wepow5zyp1.pdf
    • http://dalifajebuxog.scienceontheweb.net/dirixow.pdf
    • http://fomaxos.22web.org/punjab_textbook_english_9th_class.pdf
    • http://vesimawamom.66ghz.com/44245985383.pdf
    • http://marketeuro.pro/ata_guidelines_2015u14uk.pdf
    • http://jikalananigopun.iblogger.org/bralette_pattern_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://041f977c-1598-48cb-b578-3d63f550c8ab.filesusr.com/ugd/524ae3_aa10871dddec4b8c87c71c87778de21b.pdf?index=true
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_d8f7767ae96949199df80a64ad1ec4cf.pdf?index=true
    • http://gixunamob.epizy.com/guwemikiso.pdf
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_8da9d83f34434b89bd60866086c91159.pdf?index=true
    • http://lapetagalelan.myartsonline.com/gevenidajepi.pdf
    • https://c245485c-e1a4-4c5a-9a2a-c465a95e53c8.filesusr.com/ugd/25f824_ecfab87b6e0b4b2ebb3528533d6f496f.pdf?index=true
    • https://101c3d73-5e22-4da1-a203-a3a2a794ce88.filesusr.com/ugd/69a512_f9f206f6f3fc4e48981ec4279f64bfd6.pdf?index=true
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_37f21f27d7ad4513bc80b159876a1a0d.pdf?index=true
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_70bd026b2bd34f78a614f29fdb33da36.pdf?index=true
    • https://5c2cca0d-3a4e-48b0-93bf-8ac6c0c026cb.filesusr.com/ugd/271e65_6f13f9ac4c3944a4a4b02275f9a41f5c.pdf?index=true
    • https://fc060a1e-8c1d-4b7d-bafd-75f79d4c6355.filesusr.com/ugd/c0a468_66a73f91b79e4d41991590c2327e798b.pdf?index=true
    • 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_off0001554b.bin
c43cdfd928cb3dc85f576d58ce3df46e322eaa733564e0f126044ebeb6728b49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1554B 4708 bytes
font_01_sfnt_off00016556.bin
75bc78605b9d33c318fec892f263bff976cbb00e731718f061e0af079fc1c678		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16556 12352 bytes
font_02_sfnt_off00018d7d.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18D7D 4324 bytes

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