Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf457336f4048638…

MALICIOUS

PDF

88.5 KB Created: 2021-07-02 13:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 773cf31f72727bcf1a427dd6a191fa17 SHA-1: 7dfda4e1f6b4b29bce8608c02266b2a5c3065fa9 SHA-256: cf457336f4048638b14ced1a9b7f26423bc6c7ae311ddc80758dc658bd1a6d94
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/6igc0lp9edt0b4e1e7d4nel69e/kepozavobikizunik.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/4b885bd57c6fd8a28a955bd75d3cd45e/43594086999.pdf
    • https://hkbca.org/UploadFiles/file/20210624051553138.pdf
    • http://canavesiobruno-architetti.it/userfiles/files/nokokofobanefob.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fd802afda---kerefos.pdf
    • http://laiyi-art.com/userfiles/file/40205477252.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c48099b1c---37346377280.pdf
    • http://lapawan15.com/shop/fck_file/file/jivowefijikotubez.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9d0b23a271---77431850096.pdf
    • http://greenld.com/userfiles/5463487584.pdf
    • https://cavalier-hundezucht.ch/userfiles/file/81483991422.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce2e5ab196---badufajudonobosowe.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4c17688d9---33558529764.pdf
    • https://iuoshili.com/upload/users/files/bojizuwadalaritetatemado.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ecbeabf3e---luruxugidegopawudukaseram.pdf
    • http://tvkinter.com/file_media/file_image/file/mepajumugatoluwol.pdf
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/b321687ecdb5134d9ee1c1e5815bf3dc/bexexiv.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/e2cdv8ncp7bk9mditui923ofa7/porexonu.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c48a59b29db---losit.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/da7cc551e3d72ec9702ea9bd3602fcfb/tikupodurufilewipisonuxe.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16088950ac6d1b---sodixivinirolixoxixado.pdf
    • http://studiopignotti.it/userfiles/files/83812315932.pdf
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/zupegovirub.pdf
    • http://animationcoach.com/userfiles/file/dukozumamiviridid.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/77bd688110a038d8b0252f8eb334245c/saralutirefokixuxi.pdf
    • http://suachuaspa.com/upload/images-content/files/ronanexupewelulikunim.pdf
    • https://d1f2m3p6x2t7p9
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=free+birthday+template+premiere+pro
    • 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_off0000f525.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF525 16792 bytes
font_01_sfnt_off00010d3c.bin
8df3f30b0dc5ae6ad9dca7581d063c742a7574efb1925a9081ebf875bbfd8757		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3C 10616 bytes
font_02_sfnt_off00012536.bin
cb882910016f5f76ec35acc34078cb4959bad89c6d36dc93fbc176dc7757d34e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12536 17904 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.