Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ae75445bda6321…

MALICIOUS

PDF

63.6 KB Created: 2021-09-21 01:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8ec06a974b9b4cfa0727303743de30ba SHA-1: 838c69d1aff52166dc4d3906bef142a0aa7c7c6f SHA-256: 72ae75445bda63218863b2d7f4972b113135c279c812cf11b82f9fe68f0114cf
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with many URLs pointing to compromised CMS upload directories or disposable hosting. The primary purpose appears to be directing users to potentially malicious or phishing content hosted on these varied domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8532

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 https://gruppopolidori.com/upload/image/file/fuvataze.pdf In PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161490f24e8ed6---97293135854.pdfIn PDF document text
    • http://billsky.ee/files/file/jukatotajirani.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/50430221000.pdfIn PDF document text
    • https://aahs.givingplan.net/sites/default/files/editor/file/dezegixekuxixosefudako.pdfIn PDF document text
    • https://laundrybyconrads.com/nbloom/fckuploads/file/welutufozosabak.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/f3f4f2c431a8cd027cef127d4e4a7038/kusulimubobov.pdfIn PDF document text
    • http://jingmingtai.com/filespath/files/20210909061326.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec944f14dc---85071943364.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/91dd604b741dc00e0e10817ccd9f9c2e/10839481020.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/35727170662.pdfIn PDF document text
    • http://koreabulk.net/userData/board/file/fulamipuponuvurusa.pdfIn PDF document text
    • http://sxsasa.org/images_fck/file/1631830664.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/wuxaragevenijadifowubedab.pdfIn PDF document text
    • http://rm-centr.ru/uploads/file/63900706668.pdfIn PDF document text
    • http://contelex.it/userfiles/files/pebupaxomiralopebiwerobu.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/sigirafomaxos.pdfIn PDF document text
    • http://sevvalturizm.com/rsm/files/refaxazuminuduboke.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/1207353318.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210911_3400762CECC00E11.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/18626243905.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613252e73fa8e---juxuzof.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/ec8a14cdc247ee5b90a9f0ccc201db57/tiromubikoraxopavixituw.pdfIn PDF document text
    • http://mallenmediations.com/mallenmediations/images/userfiles/file/rotuf.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/ditatilokaret.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/1465899f16296a7997f2a024a02d8eea/41657568193.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=wps+connect+rootPDF 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_off0000c14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC14D 10060 bytes
SHA-256: a0da1c066781733f3a5f232806a0149178304f834e4f1e274d936a81a0a38e08