Malicious PDF — malware analysis report

Static analysis result for SHA-256 8906c3be2bf63484…

MALICIOUS

PDF

74.9 KB Created: 2021-08-14 05:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8b186ebbcd81bd5640b048cc07dece53 SHA-1: 5b5e69e5f4b9002dff899afa675fbb8d67f51f8b SHA-256: 8906c3be2bf634848693dfdf40fca3fa1b86cc08dd5d17a5a7137facda8b09ab
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to other PDF files hosted on potentially compromised or disposable domains, suggesting a distribution mechanism for phishing or malware. The PDF's structure and the nature of the embedded links indicate an attempt to lure users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7043

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://condominiovillage.com/userfiles/file/dotide.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7155bb6e94---89348039400.pdf
    • http://shannonlakeestates.org/fck_images/file/rozilibilasedumade.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/a0a0c2d47bbc9e4a3f14ee43ba56984b/rofogitetavade.pdf
    • https://gtnet-engine.com/ckfinder/userfiles/files/31878305618.pdf
    • https://acryl-bg.com/userfiles/file/46438637760.pdf
    • https://miguktour.com/FileData/ckfinder/files/20210607_724B164D9C42E0D7.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080798c6ffe9---15765662929.pdf
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/gopiwikerufezupabijix.pdf
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/latibovapewomugu.pdf
    • http://mtecommerce.it/public/news/file/xarukogetapuv.pdf
    • http://amuseonline.com/absite/userfiles/file/ketagisaboto.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/gqgiigugsqsgc772cr95bjhi1t/sekuxifiv.pdf
    • http://adams-gold.ru/archive/image/file/didilov.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/oqrjsjtqn6r7grp4qd8g1sh5l3/kalamegobesiratareludefa.pdf
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/50904974465.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a10d0e55ba---94549100973.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/j667pqojc24fssp4edo6p26lip/zasumijojuralunavusobifer.pdf
    • http://supermarketdv.ru/files/file/katosa.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160d35644b6d2d---kotaroribiwuvisilevaxop.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/q5dp5q1sl1cj9a6fnv8h14b6ce/92388369041.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf0631ee951---sifoxusukire.pdf
    • http://sport-way.ru/img/file/97903850946.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e49f27d83---2208301342.pdf
    • http://rideco.hu/upload/file/wegisevujoge.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=vector+calculus+5th+edition+pdf+download
    • http://e1pl2.nazwa.pl/busy/fotki/file/figarevevijixuroxitij.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d978.bin
39098dbad5d5bc5fcbf8998d9321989ce4082ff870fd275ecf5f668cdac7e80f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD978 18640 bytes
font_01_sfnt_off000109ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x109CE 16792 bytes