Malicious PDF — malware analysis report

Static analysis result for SHA-256 90b0eb8e05dbee90…

MALICIOUS

PDF

69.2 KB Created: 2020-12-19 11:31:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 275988134af3dc6ab12c33ffa4948160 SHA-1: 15d1241a0e881fd9840042087533530ec150a74b SHA-256: 90b0eb8e05dbee90834401c9bd2db5f295997564424139c6f6463f9eb49cbb97
96 Risk Score

Malware Insights

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

The PDF document contains a lure related to a student bus pass application, which is a common phishing pretext. It embeds an external URI pointing to 'trafffe.ru', a known malicious domain, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/aws?utm_term=bmtc+student+bus+pass+application+form+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425924/normal_5f98f78574194.pdfIn PDF document text
    • https://viradigoposexa.weebly.com/uploads/1/3/4/3/134383508/6886649.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418166/normal_5fb2d95a9b265.pdfIn PDF document text
    • https://gazolono.weebly.com/uploads/1/3/4/7/134721713/sejapono.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/571e1614-41af-4c8f-8449-8be8da0614c5/jakimakijamokukojukebe.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/cloth_training_pants.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/synaptics_touchpad_control_panel.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/pipajewotevu.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/mogimoxumepewawep.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd2880e31f6e49ce0620d2/1606232194863/jenexebolikot.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc33af424b06a7eb30e698e/t/5fd1c4c6b0f0f842d7a65bbb/1607582918619/formula_1_street_racing.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd486d1091525336533171/t/5fdd69998afbbc27174799d9/1608346011086/rezavuzegowupuleram.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_off0000d1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B3 5492 bytes
SHA-256: 6e876ea147791bbc2bd4e7211827a202eb942f1d21168d9eaddefdd02613b68b
font_01_sfnt_off0000e442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE442 10560 bytes
SHA-256: 4f03b93c30ff870c048dd76367c0e8654d297d2723f570c65dcf177fae3f5b44