Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb44d5ed7f6cdd6…

MALICIOUS

PDF

76.2 KB Created: 2021-05-26 17:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 25449fb6bedd49a4075e0e0e2f717147 SHA-1: 2c34187980d1b7ac6382e5defab5d05d9d4d1dba SHA-256: 1bb44d5ed7f6cdd639d91be733cd75315f71a9ce964e46ff075a4b36f9fc2786
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL that appears to be a lure, directing users to a suspicious domain. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect users to a malicious site, likely for phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/strik?utm_term=elvis+wedding+chapel+las+vegas+webcam PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453540/normal_5fed301706b5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486037/normal_5fdbc34c0595e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452376/normal_6010f56999f27.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423154/normal_5fee509d86414.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426966/normal_604a14f22e571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_603a5a415d53a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372682/normal_5fc8ecf2d1d45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417128/normal_602c71f1d1a85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494674/normal_603c610034105.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_5fdc29aa1be7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403128/normal_5fec5c4ef229b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403804/normal_60170d6b497d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450733/normal_604982f184fec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376098/normal_60674f01c18ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476432/normal_6015e3b41a7eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425919/normal_601f2f81198d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b5ebd21-847e-4f34-8024-f95012a2c1e6/business_correspondence_and_report_writing_5th_edition_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0a8b910-edff-4444-bdfb-64cb536625d3/ikea_kullen_3_drawer_chest_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4621cf7-5d9e-4182-ad43-d273ad6be371/concordancia_diccionario_strong_hebreo_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/131b32cd-0995-4bb1-9810-bcd087eb6a30/dasid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a8f5b9a-abaf-46c3-8b72-2380ba2a3f09/zoxabadagisativamela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c5590b5-8ba0-4725-b678-dec2d0f82e93/how_to_learn_lockpicking_wow_classic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78563e1d-e283-47e4-9801-4bdfff8f071f/38878360058.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C7 5640 bytes
SHA-256: 992aceae874692e78c9ad316e9016ce5ffb90bf2265f47aa05a8589b61102e7b
font_01_sfnt_off0000fce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE5 11260 bytes
SHA-256: b5e6f1079a42c6b007ce9b6bfbd131bd6e4df0d57a9b9f3067e2c28f28c9123a

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