Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa081c1bd740d1c…

MALICIOUS

PDF

65.6 KB Created: 2021-01-23 19:08:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9f02762399736417f5b0d6c1a5ae385e SHA-1: 2c194e1d03feb14dbe69a6529143ccd56b53e0f0 SHA-256: 7fa081c1bd740d1c756fd19dde148b202f08c956915331f26f2955ae6dfb743b
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, suggests a lure related to 'valuable information'. The presence of multiple embedded URLs, many of which are unknown or lead to potentially malicious content, indicates an attempt to redirect the user to phishing or malware hosting sites. The primary attack vector appears to be social engineering via a malicious attachment, leading to the execution of malicious content hosted externally.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/aws?utm_term=characteristics+of+valuable+information+ppt PDF link annotation
    • https://cdn.sqhk.co/jekuzedu/byphhTQ/kafevagelifipax.pdfIn PDF document text
    • https://cdn.sqhk.co/ximepadogi/cEuXigf/64604040643.pdfIn PDF document text
    • https://site-1256728.mozfiles.com/files/1256728/gekubenonilez.pdfIn PDF document text
    • https://site-1255397.mozfiles.com/files/1255397/landing_page_template_react.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390366/normal_5fe4f9b118401.pdfIn PDF document text
    • https://site-1166608.mozfiles.com/files/1166608/nes_snes_emulator_windows_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499653/normal_5fd7c40dda2d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426676/normal_5fde11b79a24c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461511/normal_5ff1dcabb1e41.pdfIn PDF document text
    • https://fetagurekejoj.weebly.com/uploads/1/3/2/7/132741571/kazerer_pezapolapijopix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/adanga_maru_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/19819129004.pdfIn PDF document text
    • http://xumugipetoje.epizy.com/guiding_questions_document_b_naacp_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/77350752629.pdfIn PDF document text
    • http://petetilazuji.epizy.com/91434644579.pdfIn PDF document text
    • http://kopivenegi.epizy.com/axis_camera_station_5_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/certificate_template_editable_free.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB668 5360 bytes
SHA-256: 4f4185ac07a0e26f71ade6bc1d4ff9acbfa4567eaf822a1ce0a0b4fd0c029e6b
font_01_sfnt_off0000c879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC879 10152 bytes
SHA-256: ee9aea4f927e947da2d9c3da1f9371aadb7db283ab77f5339d9ac16358d72dce
font_02_sfnt_off0000eb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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