Malicious PDF — malware analysis report

Static analysis result for SHA-256 a61a742279995779…

MALICIOUS

PDF

75.5 KB Created: 2021-03-02 14:42:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 50bf47b9f087a00654244c453c5f1b4f SHA-1: 122e0d8d4409d5e4f606e25ac05b8fb9cb78adf4 SHA-256: a61a742279995779fa507937874f0594b3b5f11a25474bdd1b2dbe91aaeb175f
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely a phishing lure. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The PDF structure and embedded URL suggest an attempt to trick users into visiting a malicious site, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/award?keyword=d%2526d+dungeon+tiles+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462345/normal_6009c76d3438f.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/Zjfggge/fujefuda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458144/normal_60000e0e31b28.pdfIn PDF document text
    • http://trynutra.shop/all_future_tenses_exercises_with_answers0a4dz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421641/normal_603c446cde828.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417122/normal_60083e6c29fde.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380867/normal_5ffaa18d015ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413361/normal_601e21b62333a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366304/normal_5ff96486213be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494433/normal_5fefd10023805.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/jgojagg/weather_forecast_for_the_week_in_san_antonio.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/alifmAl/pregnancy_tracker_week_by_week.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489404/normal_601118f86edaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475392/normal_5fdab005519b6.pdfIn PDF document text
    • https://cdn.sqhk.co/vefomatakin/iapethe/vikekixuxufojodapojisok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417656/normal_5fc98468487f8.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/GzSbjjH/knight_of_swords_love_tarot_guide.pdfIn PDF document text
    • http://istlan.space/8660128872163p1s.pdfIn PDF document text
    • http://white-x.fun/paretologic_data_recovery_pro_licens0jrfp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000efab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAB 4156 bytes
SHA-256: 5bcf7f318894cd8667f709bf970fa8c582a8027402ea75fdf14ac0e15260a4d2
font_01_sfnt_off0000fdd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD9 10224 bytes
SHA-256: e9da59df94f855f2781b3b0fc8f82a44fc86eaac6583e44a578f34f157895e94

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