Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad9b11132d29c79…

MALICIOUS

PDF

75.3 KB Created: 2021-03-11 05:17:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b7e49cb1ccfc7ffa9d8845c2232620b SHA-1: 5232f010c51809029ce220bbe659da814d35fd50 SHA-256: bad9b11132d29c79227d8cdef4869f2d99e4a67793399cd243323cfee6886f1f
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a domain known for hosting malicious content, and the document body is heavily obfuscated, suggesting an attempt to conceal its malicious nature. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery.

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://golowaki.ru/award?keyword=cts+aptitude+questions+and+answers+with+explanation+pdf
    • https://cdn.sqhk.co/gagobuniponi/gUPyvjf/28154673509.pdf
    • https://cdn.sqhk.co/dutararopat/uHpEuge/live_sports_tv_streaming_apk.pdf
    • http://fafuzum.sportsontheweb.net/buxifuribefureradixasijon.pdf
    • http://nogurufegu.mygamesonline.org/12118114806.pdf
    • http://fotubobuwenapu.scienceontheweb.net/buroxefixakovezeleji.pdf
    • https://cdn.sqhk.co/zewumirapeb/csR97gc/lemon_crinkle_cookies_uk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tudawufed/wukowobenixirexasoxemu.pdf
    • https://s3.amazonaws.com/fejififimaketo/93299226717.pdf
    • https://s3.amazonaws.com/wujodibu/advanced_excel_training_in_johannesburg.pdf
    • https://s3.amazonaws.com/rizijubovapuk/37853249454.pdf
    • https://s3.amazonaws.com/lakadutof/austria_visa_form_pakistan.pdf
    • https://s3.amazonaws.com/gawabog/aikatsu_game_pc.pdf
    • https://s3.amazonaws.com/loneminovu/49755056409.pdf
    • https://s3.amazonaws.com/xubifupi/vonuw.pdf
    • https://s3.amazonaws.com/kefodek/deceit_game_guide.pdf
    • http://gogujigasad.onlinewebshop.net/sample_essay_outline_mla_format.pdf
    • http://kojenixerog.myartsonline.com/71025552548.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb77.bin
3c0174fd14959a0252c251709cab21079fba066dbde0f974420b63099c164f8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB77 5320 bytes
font_01_sfnt_off0000fd9b.bin
617418496110e7f2b3c7286564ed6e7985e7efa86e0c607ea1a11e26f2151a96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9B 10064 bytes

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