Malicious PDF — malware analysis report

Static analysis result for SHA-256 64291dbb5650285d…

MALICIOUS

PDF

88.2 KB Created: 2021-06-27 22:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 44eaffed655536f191c18863e89e4acf SHA-1: 758910bc1ab552113bf0c00944c857651b16fcd9 SHA-256: 64291dbb5650285df794c61a02d97226d70e8bc4e02049e5a663b992b103f91a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links pointing to compromised WordPress upload directories, suggesting it's part of a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://allytemp.ru/uplcv?utm_term=use+of+typography+in+design
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607427988f96d---50638188231.pdf
    • http://mini-garden.ru/userfiles/file/57628565962.pdf
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/38277283564.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/c83fcf32d8f5ace9f4c6e5f0903814e9/55122169041.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/89f2a252459a6b54fa6e2d91b72ec61b/wilepidirofilo.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/98a92d82229e13300c34ad7f695bf74a/90878821858.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/13502bf888919bb3b42611b07554da25/48018506039.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/acff9d448243a2ec7b8eb6995ea896ae/rivazokozoxutu.pdf
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca5e5caf98---34328292451.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/g4gcpdfs6vs1n6fnrrqacg58f1/63433661620.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8298d4562---79394977059.pdf
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/muxopovajodi.pdf
    • http://jyjwqj.com/uploadfile/file///2021062101454278.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/36714b4816aa2b3ddd3f35f0aab35733/96367543411.pdf
    • https://firsatpin.com/calisma2/files/uploads/51238551987.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/4cudsfh9giub4hval0un2qo6ep/voxajalowogomogorapuve.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/a3f38e55d02bdda307ee8e63de601ebb/83838752273.pdf
    • http://sosnovgeo.ru/userfiles/file/27059557166.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/08585c67fef35994b422eb9a18d33a06/kasewewis.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/9a26b962611dd457a590ae05d76d2cda/18423697739.pdf
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/d76f532f2eb4aa07755b3f5fbb050b2f/sosufobezenuvadupi.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/4effcb508c2a859b5b821e4a13495bf8/65626815358.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/9ba379de2c8304903dab3510becc7af7/20828372021.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_off0000f665.bin
49ed1898c42a10f808feb765c394a6a4b137e99f455ed444d468f3919c20e314
pdf-font-stream PDF embedded font (sfnt) at offset 0xF665 17064 bytes
font_01_sfnt_off000122d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x122D7 16792 bytes
font_02_sfnt_off00013aee.bin
ad97a88f2637c0270623eb18f984a6fe35283019e5af3969481c1c554bcfbe58
pdf-font-stream PDF embedded font (sfnt) at offset 0x13AEE 10852 bytes