Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b8c658e9aa092d…

MALICIOUS

PDF

82.6 KB Created: 2021-01-11 04:47:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7268eb93cc3777514728cb3ed8b714ff SHA-1: 111e1936d762c2f4e1e8421f3a12b6e747991388 SHA-256: 29b8c658e9aa092d6e62ff474e8bf81db4412e15d5a7c5f94b90f6acac3fde11
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. An external URI pointing to 'trafffe.ru' was extracted, suggesting a phishing or malware distribution attempt. Although no scripts were directly extracted, the PDF structure and the presence of an external link are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=unlock+lg+g3+at%2526t PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374715/normal_5fd8f6d264df3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405638/normal_5fac0b82c17fb.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/jcYhdig/pepamavifomutataxoze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/papikumedud.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/bagatelle_fur_elise_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/sedaxozoberorideges.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/nuxazifofefalef.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/95046747946.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/sidekakizoxom.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/kifogawamuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/85610402024.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/school_annual_day_program_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/diwupovikabatusegovidub.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/rocks_worksheet_ks3.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8D 6568 bytes
SHA-256: a4af041a1f0d4c38f6ad1bf96ad04d86226b7158e00c36bfafa620d2932d04d4
font_01_sfnt_off0000eedb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDB 4912 bytes
SHA-256: 1f44fd74a113327e45c71fbd4bb2df0f758dda2646a6f63fa1c0f885034c188c
font_02_sfnt_off0000ffb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB6 11884 bytes
SHA-256: 0b1c6efa38e7ecb4941801d00ddcb4d7c33912aa5e9a5215864961aada605a5c
font_03_sfnt_off000127c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C0 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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