Malicious PDF — malware analysis report

Static analysis result for SHA-256 29bde31f1571ccd5…

MALICIOUS

PDF

80.9 KB Created: 2021-03-14 22:29:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 106e3ace547804fe1fd2a8beec810032 SHA-1: 3caf4722e4c339e7e85d269913567087c223fec2 SHA-256: 29bde31f1571ccd5ba9dbef5e8678f84948027b13496a1108b0f05b5c81b1def
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm designed to direct users to other PDFs. One prominent URL, 'https://botokaw.ru/award?keyword=caged+system+pentatonic+pdf', is directly associated with the document's apparent theme. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/award?keyword=caged+system+pentatonic+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4425910/normal_5ffab920e42a3.pdfIn PDF document text
    • http://basiditdcf.space/d3100_portrait_photography_poses_cards_bundle_freewp5zy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417139/normal_60332cf4deb43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403531/normal_6044912b4be13.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/703847698350ik25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365567/normal_5fec67c51cfef.pdfIn PDF document text
    • http://omynutural.space/michel_foucault_madness_and_civilizationz7xvb.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/82af102a-138a-49ab-8aa3-4186428dd214/febibilerumozofaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56d3cfe2-b3e2-4b97-bb87-1f384b4aab6f/how_to_write_a_romantic_suspense_novel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20debcd9-4782-4242-a944-559a6e3e28af/lista_de_verbos_irregulares_en_ingles_con_pronunciacion_y_significado.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/camera_app_for_android_pie.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/pukofifeni.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/bolesaw_lemian_dziewczyna.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/wenudeniwepusexulo.pdfIn PDF document text
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_0f65e5d4502c4bec8a735d1536ff7efb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e632695-e2d2-4c3f-9b4c-a61da99ccfd9/92138502431.pdfIn PDF document text
    • https://6e345194-e688-4037-aa24-2ff230a16836.filesusr.com/ugd/ce9fe1_74192fd8dca241dcae975bfbb67238b2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bokofapig/moto_g7_supra_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/girlfriends_guide_to_divorce_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f50765cc-b963-4438-9bcd-12544bbbdea2/lavudexodisobebu.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/dabivonewujujuzewajinife.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_off0000fd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7C 5356 bytes
SHA-256: c433f4c7e88a1d2bcc070137d36b5a7b374ffdc5dfb1d2a9a12fd28d6cb5aff9
font_01_sfnt_off00010fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB2 10952 bytes
SHA-256: 050f0bd95d4b20008c14475df8874f5e4869df6b46e8de1686e505b615942749

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