Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b910e1bc91fa4dd…

MALICIOUS

PDF

77.8 KB Created: 2021-02-16 22:47:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 1347b6d05f841e8b67c781d6babc493c SHA-1: dd6e4633d8c8827a6091cc745d8857a8571ebe83 SHA-256: 7b910e1bc91fa4dda8b8b4dbc0d4be2e334ae33d3d7c01b30a072819093668e0
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, 'druttle.ru', which is likely used to host a malicious payload or phishing content. The document body is heavily obfuscated, suggesting an attempt to hide its true purpose.

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://druttle.ru/strik?utm_term=change+grief+cycle PDF link annotation
    • https://cdn.sqhk.co/gulanuwe/phaUVjf/sonny_with_a_chance_reunion_brandon.pdfIn PDF document text
    • http://mainsale.info/pokemon_ash_gray_game_free_downloadez3sl.pdfIn PDF document text
    • http://uscreditcheck.info/beginner_fingerstyle_guitar_tabsjjpt6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444113/normal_5ffd4214178bc.pdfIn PDF document text
    • http://semengergel.ru/bncc_atualizada_2018kqqje.pdfIn PDF document text
    • http://shopmzm.site/guided_access_samsung_tablet92p93.pdfIn PDF document text
    • http://localdesign.me/vshare_helper_latest_versionx907b.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikureta/ghlNhje/assembly_label_warehouse_sale_august_2019.pdfIn PDF document text
    • http://epaytds.xyz/febimufezuwapuzudilec9hd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491665/normal_6019f391bed8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379221/normal_5fede29e5fe35.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/befarekogol/31142855245.pdfIn PDF document text
    • http://nobajoxeruxepin.rf.gd/sebikunute.pdfIn PDF document text
    • http://rarefovukafulu.rf.gd/35956801710.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/jarrod_radnich_star_wars_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/algebra_2_unit_1_linear_functions_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/92113896167.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_off0000f2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FD 4972 bytes
SHA-256: 99bf0698831fbe583541ff77e76b9b8aec6e4bf27c44ee9df5ee7de492e0617e
font_01_sfnt_off000103ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EF 11332 bytes
SHA-256: 384597ec29e74113e8700327638f0287b5741f0edcbb0ee6bd96ced25015b1ce