Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa29988c8c28286…

MALICIOUS

PDF

77.2 KB Created: 2021-02-07 06:42:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 450bebf9dae9e99a33e4fc8161ce734d SHA-1: a9acaba43a370f74c1b940e948a122815a86bcf5 SHA-256: cfa29988c8c282866558001c93cb2635a8c919cb359cb6ddc3ca8b5dbd969de0
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=gmat+official+guide+2018+bundle+pdf PDF link annotation
    • https://tiwokixaxuvap.weebly.com/uploads/1/3/4/2/134235176/3f533c24c0d4.pdfIn PDF document text
    • https://vavaxomutiposev.weebly.com/uploads/1/3/0/7/130738712/3325039.pdfIn PDF document text
    • https://cdn.sqhk.co/tibapopedeka/tgfhjdV/gunefoxizeduladaxisulilab.pdfIn PDF document text
    • https://cdn.sqhk.co/rijujonakuje/6ihlZHU/crazy_frog_jump_tap_escaped.pdfIn PDF document text
    • https://wobanavemo.weebly.com/uploads/1/3/4/0/134096337/kimawuwid-dedanuxit-godibati.pdfIn PDF document text
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/susinej-zowud-buvifusewe-gopipovug.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/M40jgid/thoracic_surgery_salary.pdfIn PDF document text
    • https://fitokuzigijot.weebly.com/uploads/1/3/4/6/134681543/rixoxixavowexajuji.pdfIn PDF document text
    • http://biweekamnf.com/50_states_song_lyrics6nsjh.pdfIn PDF document text
    • http://idealicaitaly.site/790811152590pyuv.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/gjhSiaa/vepip.pdfIn PDF document text
    • http://vermono.site/sevenexawaxez5uag.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/gYohaWL/3608768727.pdfIn PDF document text
    • https://cdn.sqhk.co/fezozepefik/4Gjjghi/jemitexumod.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/nupotukig/biochemistry_summary_sheet.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_off0000ef10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF10 5892 bytes
SHA-256: 6c1de1f8079c2d432729ea3d088246b32aca792089b78d5f0f9d6d35635a8853
font_01_sfnt_off00010314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10314 10816 bytes
SHA-256: 0d9bfe9ee3a6212444259274c49502d5c9ca2dad957836c421c7c10bb8b06c7c