Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8373c27571d9cb1…

MALICIOUS

PDF

76.5 KB Created: 2021-01-10 13:04:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f9493875b17b10f0fffb865f16e9102e SHA-1: e6f056833249a3ff32cc552197a6ca3889c6e13b SHA-256: b8373c27571d9cb15da639ed9bbc148cf10ec932daeba4e28b0d6ecc73757703
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to 'traffnew.ru', which is suspicious. The document body, though heavily obfuscated, contains text related to 'Oscar award 2018 winner list pdf', suggesting a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

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://traffnew.ru/aws?utm_term=oscar+award+2018+winner+list+pdf PDF link annotation
    • https://site-1166670.mozfiles.com/files/1166670/guxujakipasirasoz.pdfIn PDF document text
    • https://site-1176298.mozfiles.com/files/1176298/crash_tawna_redesign.pdfIn PDF document text
    • https://site-1173833.mozfiles.com/files/1173833/like_a_boss_gift_set.pdfIn PDF document text
    • https://cdn.sqhk.co/dojopaxitovi/hbjcahf/fenozeza.pdfIn PDF document text
    • https://site-1207146.mozfiles.com/files/1207146/20010285022.pdfIn PDF document text
    • https://site-1176754.mozfiles.com/files/1176754/infinite_loop_apple_cash.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/iuGNVge/charge_2_vs_charge_3_charger.pdfIn PDF document text
    • https://cdn.sqhk.co/fopalixogul/hijiFft/78432634779.pdfIn PDF document text
    • https://cdn.sqhk.co/nibedogoxov/2hqjjjL/jevolasadozagumasakiduwo.pdfIn PDF document text
    • https://site-1201322.mozfiles.com/files/1201322/kuxut.pdfIn PDF document text
    • https://site-1175981.mozfiles.com/files/1175981/talking_tom_gold_run_game_download_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vifusupegiza/97155128702.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/63686635107.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/jivimekaladowawigotatafa.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/58473087127.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/new_milford_ct_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/categorical_vs_numerical_data_worksheet.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_off0000de2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2C 5468 bytes
SHA-256: ad2f826e545e3ed6263a36c7450f8305e207e7f909b03d19b4b2acdbe0d48bd4
font_01_sfnt_off0000f0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E0 11364 bytes
SHA-256: e79d66eb5cd40aa6fd165ae760a7ce63efe3b392833d0da9b826380aa280f67b
font_02_sfnt_off00011674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11674 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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