Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d86b3dad7894d9…

MALICIOUS

PDF

81.1 KB Created: 2021-03-18 15:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b04b9d2a431d96c9563fbcb10592bcd1 SHA-1: 3df5a85c2c9d61ee452d556f813711ee111c7a9e SHA-256: 01d86b3dad7894d9f5550170f5f70dd67e04326ce26fc91d6f805eed7b934712
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'xajibur.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

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://xajibur.ru/wix?keyword=costco+frozen+deep+dish+pizza+cooking+instructions
    • https://cdn-cms.f-static.net/uploads/4402519/normal_60331f5648200.pdf
    • http://bumomuvo.iblogger.org/arquitectura_avanzada_de_computadoras.pdf
    • https://cdn-cms.f-static.net/uploads/4485165/normal_6037a88ae1371.pdf
    • http://zalixunepujo.22web.org/63199088639.pdf
    • https://cdn-cms.f-static.net/uploads/4407998/normal_60359f294fc1d.pdf
    • https://static.s123-cdn-static.com/uploads/4403673/normal_5fcf606cd8044.pdf
    • https://cdn-cms.f-static.net/uploads/4411944/normal_6048a6a3bf1e2.pdf
    • https://cdn-cms.f-static.net/uploads/4387928/normal_600fd6cf2711a.pdf
    • http://zipolilur.iblogger.org/statistical_analysis_in_psychology_and_education_6th_edition.pdf
    • https://cdn-cms.f-static.net/uploads/4420018/normal_603220295f242.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/8f19a832-57bf-45e5-81e9-7bb29d7121c4/script_writing_tips_for_short_film.pdf
    • https://uploads.strikinglycdn.com/files/dca49b29-0706-48c8-8d5c-1c561b844808/g600_garmin_price.pdf
    • https://uploads.strikinglycdn.com/files/ab9bd19c-166c-4218-8538-0b4e01d3aace/wakove.pdf
    • http://govujetimavex.epizy.com/88087275841.pdf
    • http://beruleruz.rf.gd/wigopiwuvorilexiwupupo.pdf
    • http://povuputuk.epizy.com/nevezepetodetez.pdf
    • https://uploads.strikinglycdn.com/files/9c142048-3e48-46d8-9db7-8f6a02bb2818/falapetokozizaxuluzofapas.pdf
    • https://uploads.strikinglycdn.com/files/d9107ef4-c8f2-4352-98b9-d30358fd7543/nuliwojenijur.pdf
    • https://uploads.strikinglycdn.com/files/59d4afbb-6992-4b77-97e5-1c789520529e/kumano.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1bb.bin
2fd935f763d39ad3c037450b93af01b047988ed1b62c71e4215013f6f0b45b6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BB 5404 bytes
font_01_sfnt_off0001041c.bin
4806816d7007920df137f8b2cae6115c9fa84e5fc3bcf40b9b748fb90199673c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1041C 10852 bytes
font_02_sfnt_off00012907.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12907 4324 bytes

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