Malicious PDF — malware analysis report

Static analysis result for SHA-256 12dcb3d1c20516be…

MALICIOUS

PDF

82.9 KB Created: 2021-02-03 20:15:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: bc498865c6fe86c980460eb736ccf49f SHA-1: 4dee90b5872b211c4862a470338a5a94119194df SHA-256: 12dcb3d1c20516be3145eb7481c942bf37080728702f9e5209371102e419dcc9
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that leads to a suspicious domain, identified by ClamAV and ML classifiers as malicious. The document body, though heavily obfuscated, contains keywords related to games and PC downloads, suggesting a lure. The presence of multiple external URLs further supports the malicious intent, likely to redirect users to phishing or malware hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/wb?keyword=tom%20cat%20game%20free%20%20for%20pc PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464532/normal_5ff29235a8592.pdfIn PDF document text
    • http://xbet1.fun/780516279390xtmr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458827/normal_5ff136205078d.pdfIn PDF document text
    • http://iminn.ru/antithrombine_3u4bhw.pdfIn PDF document text
    • http://tumbochka.space/wumeje4vw5n.pdfIn PDF document text
    • http://shop50off.info/aptitude_exam_reviewerli3zf.pdfIn PDF document text
    • http://gabameled.22web.org/x-_band_rectangular_waveguide_dimensions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379048/normal_5fd04787d5f90.pdfIn PDF document text
    • http://iuts.space/class_9th_biology_notes_kpki0nx2.pdfIn PDF document text
    • http://evilcheats.fun/puzzling_matter_crossword_answers2xc8w.pdfIn PDF document text
    • http://in-step.shop/10917274093031qy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368479/normal_601837f64204a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490720/normal_5fe0d92cb1b33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471253/normal_5fdf5cdb8f145.pdfIn PDF document text
    • http://alfa-quest.ru/four_4s_answers_5th_grades13br.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448137/normal_5fcd55d99a83b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497358/normal_5fd77b75a1088.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380380/normal_6001ec15233aa.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://kotasogova.rf.gd/34647335667.pdfIn PDF document text
    • http://nuvebuxuloruvux.epizy.com/insulation_foam_sheets_home_depot.pdfIn PDF document text
    • http://ginokaze.epizy.com/housing_inspection_checklist_template.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_off0000fd7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7B 4708 bytes
SHA-256: c82d7ce72e59975ff7b1733c49f15f96056a50fa9e29bf3045a948cc4a6b748d
font_01_sfnt_off00010d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D73 10168 bytes
SHA-256: a6d09b67938a46c1fe93da15aab985cde72d5af08fde6b8369ac3643376bae6f
font_02_sfnt_off00013042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13042 4324 bytes
SHA-256: 781b9fae2fb9201b4a05d2041fea553bb2973f1d011ab9c51e3326c72e342c60

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