Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc9973bb8eed556…

MALICIOUS

PDF

74.2 KB Created: 2021-02-15 09:04:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 83b779e5938a75848ad8d573e9f4049b SHA-1: c3e2494d3bdf0e14b51f07c11932f0e7b6715184 SHA-256: 3dc9973bb8eed556ccdb41614d1644289067179b81e34c9b375cece8dfbffe46
96 Risk Score

Malware Insights

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

The file is classified as malicious by ML and ClamAV, with a high risk score. It contains an embedded URL pointing to a suspicious domain, likely used to host malicious content or phishing pages. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of an external URI firing indicates an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://seumenha.ru/strik?utm_term=youtube+giant+effervescent+ball+into+pool PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417329/normal_6024039ea4cbc.pdfIn PDF document text
    • https://cdn.sqhk.co/tofegejij/7kpOzbX/police_scanners_for_sale_in_canada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475580/normal_5fc98afbca5b2.pdfIn PDF document text
    • https://cdn.sqhk.co/pekobenew/gggejaR/84660910210.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/fu8fij0/86174979312.pdfIn PDF document text
    • https://cdn.sqhk.co/fewisezux/wKrhgTI/chess_master_game_online_play.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/CY1jhSU/98443580427.pdfIn PDF document text
    • http://nerroba.info/acrobat_pro_dc_adobe_helpxh8yu9.pdfIn PDF document text
    • http://kolomata.ru/cambridge_ket_exam_sample_papers3fzbq.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/1Bgepgj/boxhead_zombie_games_2_player_hacked.pdfIn PDF document text
    • https://cdn.sqhk.co/kasesiseb/whcijib/grid_photo_maker_for_instagram_online.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwoxebu/gjigidn/nezomotu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371791/normal_6009892b0a043.pdfIn PDF document text
    • http://makamar.tech/adolescentes_tetonas_chupando_polla16gae.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/jejulurowev/md5_checksum_tool_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/build_guide_blitzcrank_ap.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/90230998013.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/dixekepagesenipawi.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_off0000e658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE658 5344 bytes
SHA-256: 4e45e338e14b662e18a7fe2a432a68012c87024bd58ff08934cc62e948cb2b32
font_01_sfnt_off0000f8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AB 10464 bytes
SHA-256: f738047134368a51b7ee3456cf250528295687c3348970a406d5c88f99f54f4b

Open this report in the interactive analyzer, or submit your own file for analysis.