Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2650e49d0ed2d8a…

MALICIOUS

PDF

77.6 KB Created: 2021-02-27 09:18:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 92cd245cdfc82c8e35be9bea3260d4d8 SHA-1: 3905241463b812fc3def56bd1ac55bf5f7ef998e SHA-256: a2650e49d0ed2d8a0c79a6a282d6e4221ecdfc9fdc92b495319b52369a2dc932
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which is `https://vilenefex.ru/strik?utm_term=1987+toyota+pickup+bed+repair+panels`, suggesting a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with common phishing techniques.

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://vilenefex.ru/strik?utm_term=1987+toyota+pickup+bed+repair+panels PDF link annotation
    • https://cdn.sqhk.co/gidenateg/bgjcwCD/67547366358.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482882/normal_6010669adf401.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420915/normal_5fce338c52fe9.pdfIn PDF document text
    • https://cdn.sqhk.co/xenojepezere/fkyyDjc/doctor_career_path_in_south_africa.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/62766103953.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/f1A6fjf/dell_alienware_area_51m_laptop.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/ugeiejf/learning_speak_english_online_free_lesson.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/X8jcgij/52317820464.pdfIn PDF document text
    • https://cdn.sqhk.co/takularozo/jhgb7zI/my_piano_has_been_drinking_lyrics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403531/normal_5ff28ef04eb59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393022/normal_5ff15f415f2fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387240/normal_601004f57fa5f.pdfIn PDF document text
    • https://cdn.sqhk.co/tedigedubemi/jhCD0Z9/nihilumbra_full_game_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fukafodifi/ez8jbjg/dune_release_date_pushed_back.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495058/normal_5ffcb941b9b16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465136/normal_5fce2828eaad5.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/fijavunabudoma.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_off0000f113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF113 5760 bytes
SHA-256: c05487ac1579613d6391d8a44b89f66d2c5a1087346ca9424ed65b6402fc431b
font_01_sfnt_off000104c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C5 10680 bytes
SHA-256: 5713f10bd1f098da4505c7eedfde57e13baac10d7d4fb174fc3591edfc06444f

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