Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f41fd81dca9b89b…

MALICIOUS

PDF

82.0 KB Created: 2021-02-23 11:32:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 4abe7f39f0c97ffa5520f731b625db80 SHA-1: 3d24b57cafffa230b8848b9126cccc1432b3281c SHA-256: 0f41fd81dca9b89b2ccec2a9c5a66758751de5fe56c4677ad5f6c42a84027ebd
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that redirects to a suspicious domain, likely serving a malicious payload. The document body, though heavily obfuscated, appears to be a lure for a movie, which is a common social engineering tactic. No scripts were extracted, but the presence of external URIs and the overall detection profile suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=who%2527s+afraid+of+virginia+woolf+1966+full+movie PDF link annotation
    • https://cdn.sqhk.co/pujimuxuja/GKhage0/talking_monkey_app_this_is_40.pdfIn PDF document text
    • https://cdn.sqhk.co/desiruzag/hhgiaVk/timifegali.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487200/normal_5ffac56f8600e.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/fidifii/nexawa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455399/normal_6006a36341bab.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/jn2Apgf/pixel_3_force_restart.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/gjgjDgi/ludijurawapogefib.pdfIn PDF document text
    • http://yoganchik.space/vazarunarigibomukemmv1er.pdfIn PDF document text
    • https://cdn.sqhk.co/gubogezemazo/jiedjec/taselozefukapenapadiviro.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/fajonubinomeder/slope_intercept_form_given_point_perpendicular_line.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/ferrari_812_superfast_mansory_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/android_developer_guide_components.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/wimiwufifasasazigixosagu.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/afan_oromo_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/consumers_report_drip_coffee_maker.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_off0001013d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013D 5880 bytes
SHA-256: a34c9dba6ab2f9a9831a787b842bd23c80941279506b6bd985948270961c1d30
font_01_sfnt_off00011548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11548 10836 bytes
SHA-256: 42a7018c70a1973e8f897d8cc5ca5d2bdb5cf15046237f1563c667ab33cb3b1d

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