Malicious PDF — malware analysis report

Static analysis result for SHA-256 92e39c8f2a194661…

MALICIOUS

PDF

86.2 KB Created: 2021-09-03 15:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: aa0bfbfa2dec01deea8a5d2ff6ffef99 SHA-1: ad44e47ba95c596e9c20857dd1388e887e2e65e5 SHA-256: 92e39c8f2a1946614dedf830e72931683a74994ec26ca5825c6433576408048a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs pointing to compromised websites and disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of external URI heuristics and link farm indicators reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://garglob.ru/uplcv?utm_term=epson+l5190+printer+pdf PDF link annotation
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/906f398ea0369c42fbc9c50ac0dddac1/mosepunoxafamikusikuxiz.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/93814862785.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160915b808ac65---77007261709.pdfIn PDF document text
    • https://nedimgame.com/calisma2/files/uploads/pijisuvabipisasumo.pdfIn PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/28063043214.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607361fcf19c9---51009941106.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1608db085b047e---98079902624.pdfIn PDF document text
    • https://dm288.rs/slicice/file/pewekapo.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/70718216929.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b9e5e6262---nuwujibadigiwitizasagiva.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afb04200788---34671746247.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160856c01edab3---66021177997.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/da8949e889e7e3a2d1b47799d3821321/11997731308.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/448d14061cd10b10a508ef4e417de25d/vubibuzanaluwuvire.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/karuxo.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/52905792261.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/2218123696.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/ao5sb8v958fnpcg4r6dg9dp16i/76425892495.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cbd5410e014---ruvuwubujatifufi.pdfIn PDF document text
    • http://psmpetcare.com/clients/76030/File/mafulekuxaxavo.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/vukexirop.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/vokinupogamejorisojob.pdfIn PDF document text
    • http://dichvubaove.online/upload/files/93263798428.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/4d38a3d74d6b6f50e627f466b1c1d6f2/rugifaxalebakebapelaj.pdfIn PDF document text
    • 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_off0000efab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BD 16728 bytes
SHA-256: 33a4846b48fb92e709261f6c4300bb8400ccf4d3520cd8ef4d37479223c9a572
font_02_sfnt_off000132c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C2 10788 bytes
SHA-256: 1c162bd2b50673434b4c1136fccc0865ebb5da54fd312570d1e7d17bc1d902e7

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