Malicious PDF — malware analysis report

Static analysis result for SHA-256 64880e6a68c78854…

MALICIOUS

PDF

93.4 KB Created: 2021-06-30 09:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e6e13fcb1efeeb979b22a6dc9a4008f0 SHA-1: 83baba47e541c4b26139cf8a149d0c10b94753de SHA-256: 64880e6a68c78854b5a8040353ab58fbf866db479b2f91ddd9bd9a39cc0977b9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, as indicated by the 'SE_INVOICE_LURE' heuristic and the numerous embedded URLs pointing to compromised websites. The ML classifier and ClamAV detection strongly suggest malicious intent. The document likely serves to redirect users to external sites that host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://archism.ru/uplcv?utm_term=tiny+spiders+in+texas
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/deb366967d399890c9ec0c1c3adec6af/numenoropujowavijimuzaj.pdf
    • https://chezgregoire.fr/userfiles/3649834825.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e756a97d9---45924863352.pdf
    • https://atcotourismtravel.com/userfiles/file/zafigo.pdf
    • http://getem.plfiles/file/mavesebim.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ec65b2223---54334538386.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/df47e463acb4957ccb74906081d57cc4/39290850383.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa205360c9---ranol.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884aecba6a2---3007143379.pdf
    • http://mtcclassof81.com/clients/0/0a/0a45bd3013a8cc77df817aa526a911b1/File/47521105192.pdf
    • https://xosobacninh.vn/webroot/img/files/mefivezas.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/1ee0akrlgjnk1sub4560attk92/28175164232.pdf
    • https://alshamiltrading.com/alshamilfiles/file/vaxidomelot.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8ccbc37a6---85616336088.pdf
    • https://jerseyshorepirates.com/userfiles/files/45688411491.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/f8aam3ti7gnmrn7co1qckqiei4/xujuxorapirobudi.pdf
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/587ed0d348dc56afec968b14c91829d8/6793309534.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a92445f271---96492604067.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/997c222b1fa4429f5c5aadfb1f6cc84f/favonidagerulan.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160db9dce74ace---xugodokawutozalozuzuj.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/olkon0cm684fs34rb0emq3ed5s/15451021691.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/8ad436ba49b3e365708da1a6da8120fe/guwowujuvijiju.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c27034dea---defagimalugunapukexiban.pdf
    • http://banlinhkienlaptop.com/userfiles/file/3740505401.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_off00010cf6.bin
a41835858ef9db978d04133fba1314aeb1dc3f789283f2d075ba34de0783439a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF6 10400 bytes
font_01_sfnt_off000124a9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x124A9 16792 bytes
font_02_sfnt_off00013cbb.bin
e23fb982a4395c86332e94d1c4475ad7451f2d8192b8feb5fb788d2e57390ec6
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CBB 16896 bytes