Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f682099556a1b9c…

MALICIOUS

PDF

97.8 KB Created: 2021-07-05 18:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7157f9b58fff0e14a4eaff238e6deebd SHA-1: 391419c5accadd0ee7adeba3c327846a93654e98 SHA-256: 9f682099556a1b9cf19789c2dd5fd36eae3f2c835acbdfaff58ff72b22b04a57
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous embedded URLs, many pointing to external sites, including those hosted on compromised WordPress installations. The primary function appears to be directing users to potentially malicious content or phishing sites.

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://nazrabilisim.com/calisma2/files/uploads/panopegalulivew.pdf
    • http://energo-market.ru/sadm_files/kiwadetasabasopanaleno.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/scoa0ha4adsutj7nq4vpu0ne2r/revapuwoporekivasinebana.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609078c9b49fb---radulo.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a354cfa693d---nurusa.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160742b7c064e2---47238769977.pdf
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/e3d551a6f2e096fc87925471fb816531/44117769446.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077e4938a99b---wafuberovijiw.pdf
    • http://xaydungphongphu.com/uploads/files/dipuvobife.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aadcf268e71---73058396500.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a669c806e32---xegim.pdf
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/a95b64408136b3f110ec303df9c323c0/baderise.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072fb957497b---nugovitixifimiwoforurivur.pdf
    • http://charivne.info/images/file/namofoxulovepobuzezu.pdf
    • http://bearings-home.com/userfiles/file/majisikefezaz.pdf
    • http://xn--dlek-5qa.com/admin/UserFiles/file/kezixamotabudelenizatufa.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/b8b7095f32fef1a8b9b2a0e46c5bf920/vizodiwajav.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160a68bb838335---20620593335.pdf
    • https://bio-obst-und-gemuese.de/userfiles/file/tedaviremajogukujina.pdf
    • http://9meclinic.com/ckfinder/userfiles/files/ruruxekizotif.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8dbbae5cfa---zedekadojagesusamozok.pdf
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/dexibawagexij.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=zoologist+work+hours
    • 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_off00011f24.bin
cb92f8498800087b10902d1721b2838d173f560595f453ad44b185747a1a164f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F24 16832 bytes
font_01_sfnt_off00014b07.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B07 16792 bytes
font_02_sfnt_off0001631e.bin
658416f3b484e750efc956921825600136d063393c98171617dfc87b65d3e783
pdf-font-stream PDF embedded font (sfnt) at offset 0x1631E 10232 bytes