Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b26cd92e303d97…

MALICIOUS

PDF

86.6 KB Created: 2021-07-26 06:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 32f1027b7a8540574b5c5875bb704efc SHA-1: 95019619963f37a429b7e4949c64aa4f73ad78b0 SHA-256: 69b26cd92e303d9796fe869b98887aaeccdd67f3a44f680a4ec0b4e31477c414
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or redirecting users to malicious content. The file's structure and URL patterns are consistent with a link farm designed to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 http://bet-balance.com/userfiles/file/57559141864.pdf In PDF document text
    • https://fallsplat.se/file/42163591869.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a5412ac14c5---81221765978.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/9a9fbae9597df71ef73169cc838c286e/73590737173.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/31662344431.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3934860f77---pudugefigukaxad.pdfIn PDF document text
    • http://acquadiqualita.it/ckfinder/userfiles/files/69842400874.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160b2107127db1---giveduvifimulorikitowebe.pdfIn PDF document text
    • https://skvacations.com/userfiles/file/beparazudufefepugalodamad.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/64514555451.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16077845978851---2158848409.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/kuwugoxomutirip.pdfIn PDF document text
    • http://rockfordauburn1966.com/clients/8/85/8549db0cc7d1f63cce07d3be93bd6f3d/File/wifexepiruxamupolijejes.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1b29ecf169---66585317135.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/vajinapovo.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c09582e962b---78961808382.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/s73h1mcmf4ea8u11psps1afq74/vexirizu.pdfIn PDF document text
    • http://zuestag.ch/userfiles/files/radupoguwebovikozonabas.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/wijulufopidasakun.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/nexebijogopetizojidulor.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/6794fbfa162c0300212558dc9bd7a0d0/takifobusuropavovo.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087844ea88c8---lafemelubiluzikuzumixo.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/defujotepodaj.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/8ba80be514e3f855eeffb0f537f04d17/27081890866.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160884edfb7932---rupazuwakotitekararubi.pdfIn PDF document text
    • https://avayemehr-carpet.ir/data/file/sedobox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=2016+kpss+lise+matematik+sorular%C4%B1+ve+%C3%A7%C3%B6z%C3%BCmleriPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE704 11644 bytes
SHA-256: 47b1c0490fc202a23a3ee35d0309edaff0deaa904edf60ffce13813a0bcf8390
font_01_sfnt_off000101fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0F 19168 bytes
SHA-256: 57d53bad01d750e28231c202ca2365a7533a12929ecdf24912b9d9b28ea86fd4

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