Malicious PDF — malware analysis report

Static analysis result for SHA-256 c85db7949172fe79…

MALICIOUS

PDF

73.3 KB Created: 2021-01-27 13:51:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c5a455d1fb56a9c41ab7e852b9181fca SHA-1: b1cbad3ae94dda6c13feecd2f3368445099ff3ee SHA-256: c85db7949172fe79a406686553079342bd13931ef446fd3a22999f0e4546b842
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, contains text fragments related to 'Appvn apk here' and the authoring application, suggesting a lure for potentially unwanted software. The presence of multiple unknown URLs further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/123?utm_term=appvn+apk+here PDF link annotation
    • http://good-production9.site/gavisizanewovuzaguz43zv2.pdfIn PDF document text
    • http://beautysale.site/all_computer_related_full_forms_downloadyhopa.pdfIn PDF document text
    • http://rmk4sale.xyz/design_fmea_exampledb24x.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/beK4ieO/75977544824.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/bWSJlIL/top_instagram_hashtags_tags_for_likes.pdfIn PDF document text
    • http://allostar.buzz/modern_a_drum_kit_crossword4eeow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371808/normal_5fe119e3a9d9c.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/gfBVmig/nupor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446914/normal_5fe16be9760db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421205/normal_5fee9e5223fc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490920/normal_5fd798f6adb61.pdfIn PDF document text
    • https://nubapatis.weebly.com/uploads/1/3/4/0/134095887/9746768.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/eBibge3/good_drift_car_forza_horizon_4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384831/normal_5fee3184e2eea.pdfIn PDF document text
    • https://silagonamep.weebly.com/uploads/1/3/1/4/131452845/suves.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490936/normal_5fd1775a7b97e.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/dgffghh/ping_pong_vr_table_tennis_simulator.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/baxunaf/biggest_accomplishment_interview_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/sulfur_dioxide_lewis_structure_with_formal_charges.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/modal_auxiliary_verb_exercise.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/rusaxawikifumadif.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_off0000e2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B9 4812 bytes
SHA-256: 02fb29caaff121ca2580a0a0e0dbe9b23727971bdf3e641f4e37d877e7857f01
font_01_sfnt_off0000f31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31B 10872 bytes
SHA-256: 13fcc5226ad13690afb1195aa113081a0a6e8e788a32e0b20d02bad9c70c195e

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