Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0b59469e6b042ec…

MALICIOUS

PDF

114.0 KB Created: 2021-03-10 10:54:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 36c834769a70caef87653aaa10103ef4 SHA-1: 521fe2bf7202901d77322848cfd3217b443908ca SHA-256: a0b59469e6b042ecfa91d6f7f7eb9d66ff9ade10aa49fe01ffa4e40c9e2b651c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'zajinet.ru', which is likely part of a phishing lure. The document body, though heavily obfuscated, suggests a theme related to an 'Arcadia group annual report 2020 pdf', reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/award?keyword=arcadia+group+annual+report+2020+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459921/normal_602a48b737a3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496378/normal_6041b915784a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530323/normal_6029649a52787.pdfIn PDF document text
    • https://cdn.sqhk.co/dobajinorite/X7jeMTr/gusipazugo.pdfIn PDF document text
    • https://cdn.sqhk.co/talegejusa/fgegihj/dafivavijeturifelini.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366354/normal_5fc5c249d07bc.pdfIn PDF document text
    • https://cdn.sqhk.co/ferudati/ijgdjbZ/takevomoweji.pdfIn PDF document text
    • https://cdn.sqhk.co/wewutivuv/ejhiidy/bsde_annual_report_2016.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
    • http://ganusigesu.rf.gd/lovofaxiwumo.pdfIn PDF document text
    • http://lotitivixuji.rf.gd/37376882796.pdfIn PDF document text
    • https://a8fdb364-3865-4521-a36b-e12f4de7752f.filesusr.com/ugd/e20637_0adb5cc8d58d44a8aae4cae230bad500.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/2600894758.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/nursery_rhymes_lyrics_with_pictures.pdfIn PDF document text
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_0cc1d38e1b4547e2baef87ffa92c5165.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dojonuta/compliance_policy_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/zewofurafikijapuzulevi.pdfIn PDF document text
    • https://30cc9e9c-6145-4029-bfdc-d0561bdb3a10.filesusr.com/ugd/0dcf4b_37d8b4fe6222483e8edd3cbcdbcfbb7f.pdf?index=trueIn 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_off000173eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173EB 5288 bytes
SHA-256: afa7baa9583b2ab53d4747d32ec63fa0174130af09c995e6217d12aad0cebf67
font_01_sfnt_off000185f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185F0 11340 bytes
SHA-256: a3b9e4f2bd8c76e311f2d96372110059717456e5b82c6674a7379819a0a18b5b
font_02_sfnt_off0001ac42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC42 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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