Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b6e4ac5464040b…

MALICIOUS

PDF

83.1 KB Created: 2021-04-05 19:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8eb0847b2b793e7f5d96680e4a19e280 SHA-1: cbbf279f40d2bc108aa022df7998797d38b84c66 SHA-256: d9b6e4ac5464040b42f6d3be8b9404640a85958ac13851af8ecc19c8ad355b67
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 embedded URL `https://druttle.ru/strik?utm_term=v+shred+ripped+in+90+days+free+pdf` suggests a phishing lure related to fitness content. While no scripts were explicitly extracted, the PDF structure and embedded URIs are commonly used to deliver malicious payloads or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://druttle.ru/strik?utm_term=v+shred+ripped+in+90+days+free+pdf PDF link annotation
    • http://bodagimama.iblogger.org/synonyms_worksheet_grade_5.pdfIn PDF document text
    • http://qlemelest.online/how_to_fold_graco_modes_duo_stroller_with_seatsztfn3.pdfIn PDF document text
    • https://cdn.sqhk.co/tefaxobaf/aaMggbv/tanks_battlefield_y8.pdfIn PDF document text
    • http://wegutamozeji.iblogger.org/retorika_at_gramatika.pdfIn PDF document text
    • http://zajidowexuret.22web.org/maginedipazoxumawe.pdfIn PDF document text
    • http://morpeoplelife.ru/14904114906ie72t.pdfIn PDF document text
    • http://insurancesouk.com/what_is_a_pack_line_defense_good_forhw6cl.pdfIn PDF document text
    • http://esplus.pro/22108369748h77gj.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/yhdCJhg/37661980046.pdfIn PDF document text
    • https://cdn.sqhk.co/lexelinowe/piiWZjj/final_fantasy_8_remastered_xbox_one_walkthrough.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bisofok.epizy.com/jim_stoppani_shortcut_to_size.pdfIn PDF document text
    • http://vekotan.epizy.com/do_you_need_to_use_weights_for_abs.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/vifopibapoxu.pdfIn PDF document text
    • http://bekazutebazifob.rf.gd/what_is_tapping_for_weight_loss.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/beforward_toyota_rush_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/lesiresumanemefidewudowu.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/72770422443.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/8961743540.pdfIn PDF document text
    • http://ferenekukosazu.epizy.com/25199812628.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/62741292410.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/how_to_change_the_battery_in_garmin_vivofit_2.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/79303661811.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85C 5060 bytes
SHA-256: 5d85771f3eae979cf2e5a618ffb6e3da7f9184043b269d1737369d8195f41762
font_01_sfnt_off0001097a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097A 11092 bytes
SHA-256: 5c135530a54a15858dffb88b7933023334f992f5e9f61eaeaffa353f6b6cdc80
font_02_sfnt_off00012f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F62 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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