Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9af8be75823c6a…

MALICIOUS

PDF

75.8 KB Created: 2021-06-11 18:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 485ca0261e18e2ed0434ede8b34cd887 SHA-1: 0c794fa7ec8570eebc3f6f94de721f554cc238b9 SHA-256: fb9af8be75823c6aa643aa8ab02ffa5017ca29184ab9fbc89ffb4c8004fc53bd
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An embedded URI points to 'https://chcial.ru/pbw?utm_term=watch+deadpool+2+online+free+123movies', suggesting a phishing lure related to streaming content. The document body, though heavily garbled, contains fragments related to streaming and the wkhtmltopdf tool, reinforcing the lure. No scripts were extracted, but the overall structure and URI indicate a phishing attempt.

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://chcial.ru/pbw?utm_term=watch+deadpool+2+online+free+123movies PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476595/normal_60c2e11551909.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370746/normal_60011df6c4df6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414701/normal_5fe0807c7444f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421788/normal_600962918ba0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497646/normal_5ff0d4296b83e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452835/normal_6040d94795680.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_5fd2dfc539c23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393028/normal_60166002162c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453115/normal_6020a5ee2e23d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_605cb298b58dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368471/normal_603dd36c550a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469631/normal_5fe992d1979e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460463/normal_603496e6141f7.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/b8583380-8962-4a6d-bcc5-0e9f19455ef3/cakewalk_bandlab_guide.pdfIn PDF document text
    • http://zulamiz.pbworks.com/f/barbie_12_sisters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a68a2da-2e96-4e06-85c1-8a7b7d2dd299/muvabizufadatekivivu.pdfIn PDF document text
    • http://wixugigir.pbworks.com/f/dead_target_redeem_code_2021.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_off0000e703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE703 5816 bytes
SHA-256: ab1c38706456ccda02d1b439292fa04ec0aadda0a8b1893fc11d29f535315f79
font_01_sfnt_off0000fac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC2 10952 bytes
SHA-256: cde0a4e6330b5d479b162b10b4a0d625f87552786217fc71852f3b809ccf195a

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