Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f56be1910dbc6b…

MALICIOUS

PDF

76.5 KB Created: 2020-11-18 10:03:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 88af30ade443a0693cc1d87c8dbc6f6c SHA-1: d4b6877e6d3462b64a08316788475d1120120d79 SHA-256: d0f56be1910dbc6b98bba7f0b9876ee761a1cb0284906276abbb66b42dfeef2a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=shigeru+aoba+johsai'. ML classification and ClamAV also flagged this file as malicious. The presence of embedded URLs and the nature of the redirector strongly suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/123?utm_term=shigeru+aoba+johsai In PDF document text
    • https://befejabenitegi.weebly.com/uploads/1/3/4/5/134530095/tawoxakalekure_gurokiresebige_duxukuvikoresev.pdfIn PDF document text
    • https://lorebigida.weebly.com/uploads/1/3/4/3/134377432/6a61f54714562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408701/normal_5f9351c28fe7d.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/towakog/nikko_stirling_gameking_4-16x44.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/darth_plagueis_book.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/35960308968.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/37040078328.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/togiveri.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/62144927039.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/music_references_in_jojo_s_bizarre_adventure.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BA 9008 bytes
SHA-256: d1ad41ec5ce997338bbe69fe55931cbb2630db2693d1703b6fdd34c24ced96ac
font_01_sfnt_off0000eedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDF 5232 bytes
SHA-256: 43ad16aed5bb6f77c8cf525d213ef3516e21cc41d23ffe32e0cc9b06d6f8ee7b
font_02_sfnt_off000100a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A1 11128 bytes
SHA-256: da51fb7ec4739be46f47a443385f717805ae357773359edb1b5ce7d15fc2d406

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