Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7ac592f12dbffb…

MALICIOUS

PDF

78.7 KB Created: 2021-03-21 09:27:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48b0f9cb6cd691387fd6b1d8ef61f879 SHA-1: 49c278d3e2fb0be8e3272d4f4f4dbcc83782651b SHA-256: 1f7ac592f12dbffb1c883eac37fa7958d694c039a2c3d6849108270fa112f7c2
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'fokemale.ru', which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains metadata related to the URL, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/123?utm_term=avenged+sevenfold+afterlife+video
    • https://cdn-cms.f-static.net/uploads/4470523/normal_602fccbfdf937.pdf
    • https://cdn-cms.f-static.net/uploads/4498702/normal_5fd8068d2c4bc.pdf
    • https://cdn.sqhk.co/miloxuso/fHHghjd/34668230142.pdf
    • https://sinupumu.weebly.com/uploads/1/3/4/8/134893056/9741f3d63b134.pdf
    • https://jarosebat.weebly.com/uploads/1/3/4/6/134695718/8972854.pdf
    • https://cdn-cms.f-static.net/uploads/4382405/normal_604b431d7c612.pdf
    • https://cdn.sqhk.co/safubuguva/jaoAghq/super_mechs_game_hacked.pdf
    • https://cdn.sqhk.co/xigofidiw/MiihgGV/veziremaxuj.pdf
    • https://static.s123-cdn-static.com/uploads/4493209/normal_5fc940b1689b9.pdf
    • https://static.s123-cdn-static.com/uploads/4473638/normal_5fe39465cc24a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8e86c062-32c0-48a1-a395-fd6d9e0848e9/zilonebuwa.pdf
    • https://s3.amazonaws.com/waxegatulo/que_es_el_buzon_de_voz.pdf
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_e97f1f12d6f54a7eb01ec69e446b9bc9.pdf?index=true
    • https://b998fa74-583e-446a-a2a7-67f41460fdb2.filesusr.com/ugd/e081f8_75a8918a436f4b5c89a53c0f59137d8a.pdf?index=true
    • https://s3.amazonaws.com/tobito/removing_stuck_caliper_guide_pin.pdf
    • https://s3.amazonaws.com/womirofop/moniciones_domingo_xxii_tiempo_ordinario_ciclo_c.pdf
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_c8a1b7bcf56f4f7c907c3798ff6c9cc7.pdf?index=true
    • https://abe99a74-823b-4c5d-85d6-f8d8de52422f.filesusr.com/ugd/73cc63_06b605957d2c4bc6ae9cd67a9ef17e0d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5b240ee5-81d5-44de-b5fc-a52f608755b1/13572388139.pdf
    • https://s3.amazonaws.com/muvojugejoxip/verodeb.pdf
    • https://s3.amazonaws.com/wotodedaruzuk/report_phone_fault_virgin_media.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7ab.bin
8dd2be50bc883965db0e9d7ab006a70548bb9ce5fe998ec27d5c46893caafc16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AB 5124 bytes
font_01_sfnt_off0001093a.bin
1922b5aac2d8b218b637f45fbae13f3ba66906443a6e421606e472715481ac72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1093A 10932 bytes

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