Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbc3a8bdc104835b…

MALICIOUS

PDF

205.4 KB Created: 2021-06-08 12:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a1f4d9c9bbdd13c1d3043705f2dde4f1 SHA-1: 92814d4882411605d6eeeb3572e589d550e7ad12 SHA-256: cbc3a8bdc104835b7beb34ed4090d4890fda804c3312418e8b5e71b326147363
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be a lure for downloading video content, which is a common social engineering tactic. No scripts were extracted, but the presence of the malicious URL and the detection signatures strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://ketchas.ru/pbw?utm_term=abcd+climax+hd+video+song+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415767/normal_601d9f96577e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423462/normal_606057a93a5e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495269/normal_6020cb07dfb4f.pdfIn PDF document text
    • https://taponoranasigem.weebly.com/uploads/1/3/4/6/134643922/fa256b99.pdfIn PDF document text
    • https://newejata.weebly.com/uploads/1/3/3/9/133999860/pusubid_xuzise.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455642/normal_5fee379fa280b.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4366402/normal_60b2038d772b4.pdfIn PDF document text
    • https://nagejezesalu.weebly.com/uploads/1/3/0/8/130874580/lasekug_zeriwakivoporex_jalosupimam_pasedezelil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460446/normal_60277f88251fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486374/normal_5ff095eb55a55.pdfIn PDF document text
    • https://kigivalivago.weebly.com/uploads/1/3/4/3/134337689/7532319.pdfIn PDF document text
    • https://negapisege.weebly.com/uploads/1/3/4/6/134635707/c2b804cc06445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382192/normal_5fe996379f162.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424996/normal_6034254474583.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xifatarege.pbworks.com/w/file/fetch/144685284/ost_about_time_part_4_money_heist_come_out.pdfIn PDF document text
    • http://pagorevet.pbworks.com/w/file/fetch/144768240/1995_mustang_gt_distributor_firing_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/232694c4-4ce4-4a15-adff-9187a023d17d/two_step_inequalities_worksheet_9th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee31097-c184-4ed2-a3e9-754994bd3894/memory_recall_meditation_techniques.pdfIn PDF document text
    • http://tavaretaz.pbworks.com/f/planeaciones_de_tercer_grado_preescolar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90d5da9c-092e-4016-adf0-0c2953e2383a/hermosas_criaturas_pelicula_completa_en_espaol_gratis_online.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/f/how_to_get_25_000_robux_for_free.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_off0002ecf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ECF5 5608 bytes
SHA-256: fb75101ac42e46e89539e787cf1740155cbc30f866602338085029e4f06c42ec
font_01_sfnt_off0002ffed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFED 11960 bytes
SHA-256: 9ea2ae245491091ffda5d839ccaa6bd27d17c7c87ec844c025a81ee451bf8342

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