Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8807f061e0e8e2f…

MALICIOUS

PDF

86.2 KB Created: 2021-06-26 22:35:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f57ccce78588b31d7b5229143df90aaf SHA-1: fc3f7e7021981f5420d190b48180c007dd789814 SHA-256: e8807f061e0e8e2f9e151cfe90bd71e86b44ab6bf52859d660d509126fa34300
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV. It contains numerous links pointing to compromised WordPress sites and other domains, indicating it functions as a link farm. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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
  • 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://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/tlgo8ou830602thnpfohlgkh4u/54640839957.pdf
    • http://rollfactorytogo.com/uploads/files/tofotanipagemujuk.pdf
    • http://antwerp-reefer-tournament.be/argt/files/87973600031.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/0f98aec34e34711b249f45a8a6ea32e9/6257318815.pdf
    • https://promobryansk.ru/userfiles/files/12109847717.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/6e453593aeb7104bdd4d62fc0bcf14ca/62527068483.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95073a5291---3144610788.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/gdu414tqbamqhhpt1pt0pr3mm3/26459533917.pdf
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/30828414877.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/18b649ce4ca3fc5ef1aa3908f698c44f/79190135071.pdf
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/477bc90bd5a3cdc443cc5c690cf6787a/1134010617.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886ab1b864c---25308833391.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/969107b01f2a537b307a6db2195ca57b/widolovijujetimobutazeguk.pdf
    • http://xn--szabowski-tub.pl/userfiles/file/10365293829.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/0d10180c0a62120ba2312cb9da35abbb/76902288395.pdf
    • http://hanhthien.net/uploads/file/zavenefo.pdf
    • https://artasedanasingaraja.com/uploadfck/file/bubijasupunajoli.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/531946b1095796df7e9b88d089fe3734/lokobozal.pdf
    • http://ajisushionline.com/uploads/files/wowevuxija.pdf
    • https://keluargamimpi2.com/contents//files/vejisasotakufize.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/4ec537760c4f33db0fa593fa6079c62a/repifigirufu.pdf
    • http://bularz-auto.pl/images/userfiles/file/mumevanadoxefozem.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c997bbd376c---88041344402.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd2b7a7614---55362503466.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=wow+cataclysm+fire+mage+guide
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eced.bin
7a9aaa4679a123ada7380560589246d2987b064c78768eaf0c762b069f208e69
pdf-font-stream PDF embedded font (sfnt) at offset 0xECED 17440 bytes
font_01_sfnt_off00011a06.bin
c27e1a52ad8e86a828ba9d409d2a2334dc5841f726e99fc7c20baf05cf6a8708
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A06 11008 bytes
font_02_sfnt_off00013384.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13384 16792 bytes