Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b3726832b8cf88…

MALICIOUS

PDF

79.5 KB Created: 2021-02-14 05:20:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50c27d9200875bd1b6a5fc890b1fa768 SHA-1: 9ea59aff7ca744b35f3c476d2aa7180880f1c51a SHA-256: 30b3726832b8cf887029b355a73615a0a83ea8b5d95e414e3570f54ce3f77fd6
96 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs that redirect to other PDF files, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of external URIs and embedded URLs points towards a phishing attack, likely attempting to trick users into downloading further malicious content.

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://leonvi.ru/wix?keyword=apk+jetpack+joyride+indir
    • https://static.s123-cdn-static.com/uploads/4408720/normal_5ff3aba7dfe80.pdf
    • http://varietystore.website/color_notes_app_for_pc1hp50.pdf
    • http://alexsaf.ru/pegugexazudoi0c74.pdf
    • http://helpcontactform.com/stardew_valley_growing_grassf067v.pdf
    • https://wifevotus.weebly.com/uploads/1/3/4/8/134897576/7da4f8cd.pdf
    • http://koolmaxt.online/51613180533roxl9.pdf
    • http://gdztut.com/video_burung_anis_merah_teler3j80b.pdf
    • http://bazis-rostov.com/super_ben_racing_hero_ultimate_alien_superhero_gamesb1z8r.pdf
    • http://osmosiotzs.fun/chelsea_fc_vs_watford_video9aj4w.pdf
    • https://cdn-cms.f-static.net/uploads/4416675/normal_60160b8c3728b.pdf
    • https://lexawuvake.weebly.com/uploads/1/3/4/6/134610488/vuwiroboludimoz_lezasadobomi_bogejo.pdf
    • https://wewodagib.weebly.com/uploads/1/3/4/2/134266566/548998.pdf
    • http://get3creditscores.info/guided_reading_resources_ks2hooyq.pdf
    • https://sobomevoza.weebly.com/uploads/1/3/0/7/130739746/bf9aae1c.pdf
    • http://fortuneocredit.com/nuance_power_converter_for_macpq9i4.pdf
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/mizeju.pdf
    • https://xosufovopoxom.weebly.com/uploads/1/3/5/2/135298930/2465184f168f39.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000fb3c.bin
c127c69b4d5ec1f3a2d56836026b4147ac3afd2e38e17e869f7b812c1644d983		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3C 5088 bytes
font_01_sfnt_off00010caa.bin
6093470747fbeb4fc7b369e86796aa644554a11686c11cb7a8afae7f791a1fc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAA 10224 bytes

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