Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7067489c88dd5b…

MALICIOUS

PDF

54.6 KB Created: 2021-09-28 18:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8364a6edd4f493574bd04c058719d95e SHA-1: 80add6e648a96e66b5da1b5d7442201958b10343 SHA-256: fc7067489c88dd5b189d202cdc0d8b6479223c7a28b28d522b7d099e9a461cfe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to compromised or disposable hosting domains. These links likely serve to redirect users to malicious websites for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8104

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://bulmarconsult.com/files/welivaxukajaxek.pdf In PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/9bslfahq61db8dcb580faih6hr/xafuxukidunoside.pdfIn PDF document text
    • http://mebel-moscow.com/content/xuploadimages/file/11092554358.pdfIn PDF document text
    • http://teknis.it/userfiles/files/xevutete.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161465ffbc8675---wuriberilezikurozaguku.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/dawesejusarovunigedesa.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/makububutujiruvuve.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16150cc3c1e3bd---81276153172.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/15387216486.pdfIn PDF document text
    • https://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/78347852136.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/161331b6879b4e---fujakefi.pdfIn PDF document text
    • http://funagamex.vn/PhuongNamGroup/userfiles/files/5876365236.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210916_07F3FA083BB83702.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa256e67d2---16291923206.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/bakusukifewakivip.pdfIn PDF document text
    • http://bfcy88.com/uploads/files/xamadejuvudefivokuwez.pdfIn PDF document text
    • http://phuclocvienjsc.com/uploads/image/files/retegobi.pdfIn PDF document text
    • https://ratosatu.com/contents/files/xevulewamejijexuli.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/a1155188049aae6e2ec5559f4811616c/64621884276.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/3a8366198d20bb2b31a83fe780ac8887/vukalonu.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/51596330160.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/vomosis.pdfIn PDF document text
    • https://heart-calligraphy.com/uploads/files/202109221300485114.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/80019122214.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=action+dash+appPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB76E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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