Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1abb0b19ed20075…

MALICIOUS

PDF

67.8 KB Created: 2021-09-24 05:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0efb14ae71eb1e2177e1f61cd9192755 SHA-1: 3e592a543676bd81c36d5ae8eb1ef2e12b0c64ed SHA-256: c1abb0b19ed200759816048a7dcd30d8a51930d17e75e4da417a005dbdb84746
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6872

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
  • 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
  • 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://foulardfotografando.it/file/kajimubik.pdf In PDF document text
    • https://somogyplusz.hu/files/rakisurusixudi.pdfIn PDF document text
    • https://9ja-bet.com/userfiles/file/xakoxuxatir.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/73205538126.pdfIn PDF document text
    • http://denprokhorov.ru/images/file/bedijemo.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/43558612104.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210905_5D7B093397AB6A70.pdfIn PDF document text
    • http://studiotecnicomaglio.it/userfiles/files/wuzodozejuf.pdfIn PDF document text
    • http://woodlander.sk/grafika/file/xuxaruzubobozegobewened.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/91612983770.pdfIn PDF document text
    • https://russiancosta.ru/ckfinder/userfiles/files/xoxurigumelabizikazuwonus.pdfIn PDF document text
    • https://electroagro.es/pub/files/28690718413.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/lodupobuziwifejajid.pdfIn PDF document text
    • http://skinct.com/upload_file/file/Fl202109100145425934.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/92478738393.pdfIn PDF document text
    • http://bscartridge.com/pic/rarinezazuviret.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/rewumoxowedafipobamekixom.pdfIn PDF document text
    • http://01host.ru/userfiles/files/52426855675.pdfIn PDF document text
    • http://fireprovietnam.net/luutru/files/netusefo.pdfIn PDF document text
    • http://mtt-association.fr/upload/file/guboput.pdfIn PDF document text
    • https://alaqart.atelierleuthold.ch/userfiles/files/96795956017.pdfIn PDF document text
    • https://zhongzing.com/uploads/files/202109070309457975.pdfIn PDF document text
    • https://suacuachuyennghiep.com/uploads/files/zobitevokiku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=ice+age+3+full+movie+123moviesPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C9 10840 bytes
SHA-256: ebb383f19b5c77bb173405ef240874870cab340813e04edd763b0f7078309350
font_01_sfnt_off0000dd00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD00 17060 bytes
SHA-256: f8c188880649e1d36895496be5cdcea8fd979781c1e88b58c5b11ac74ad7f7bf

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