Malicious PDF — malware analysis report

Static analysis result for SHA-256 0780bc760c33328c…

MALICIOUS

PDF

76.2 KB Created: 2021-07-05 15:35:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8b1e00f823c904857832b2cc83a12416 SHA-1: cb04d813f05495bf80aeeef131962e06ec5bda4e SHA-256: 0780bc760c33328c78057ce098a715b63de443de92a4516205595387aa3cadad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of links, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The PDF's structure suggests it's designed as a link farm to obscure the ultimate destination of the user's click.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://catamma.ru/uplcv?utm_term=cool+minecraft+pickaxe+names
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/b54856559b20553bbe16343a687051d5/gokogisuredemaxute.pdf
    • http://yournamebadges.com/withyourdog/cms_uploads/file/45166644481.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/56da1a4366fa1fd95c56bc276d9c8f80/23559368826.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/c494ee35a72e1f197e02ad4f84d4d3ca/42815070418.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/95ff65c7bb675e8c8d0ad629ad3a4a7a/ralufodomupu.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071993065a77---96048607252.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607813a01f375---gijujofonikuxabowapuwawug.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925d695c593---vegosexa.pdf
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/wizofi.pdf
    • https://psychologgia.pl/Upload/file/wixinedazukewi.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/c51f7e734ee8f8d08f6ee68537683bc7/didufogewofe.pdf
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/gulugosamirimokomur.pdf
    • http://wedding-ideas.ru/ckfinder/userfiles/files/teronivewatuv.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/52ptkufldr08bkheknp0q111so/40085352733.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160897528dfd8c---77862244839.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/vhbvjkdi8hvji4hecvgeb2jpk2/67195562817.pdf
    • http://alhouti.com/userfiles/file/15052529258.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e55a42e20b---kuwuwefibekigaz.pdf
    • http://studiofantino.it/userfiles/files/pupuvaxaxemekovadewulup.pdf
    • https://rrr71.ru/upload_picture/28486780738.pdf
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/74732334911.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16089a2acb782d---kivososav.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608189358f072---68075975526.pdf
    • 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_off0000c747.bin
0b674f31f6173299ef55435274c197126adec4e4a6a625fe6a12c5d4672b4599
pdf-font-stream PDF embedded font (sfnt) at offset 0xC747 10868 bytes
font_01_sfnt_off0000e063.bin
c9eb14cc0011b0aef65e92ffc52ed440e2103d921b3dc4d2003df178d642fe1f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE063 16480 bytes
font_02_sfnt_off00010b5a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5A 16792 bytes