Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0b2a2dd03058ff…

MALICIOUS

PDF

84.4 KB Created: 2021-08-29 07:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e98bd4d3abd11c219c77e6dfcc50e360 SHA-1: aeffc6b46acd812af02ed29edbaa47338dcff16e SHA-256: 6c0b2a2dd03058ff7de84077f081a8dc2d9318d9aa7bcede68f5d7458d8ccb52
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://wastran.ru/uplcv?utm_term=applications+of+logarithmic+functions PDF link annotation
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/7176883898.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/lsnc4daoeecl82kvjk92ovbpd7/dapinubofijomedizesovu.pdfIn PDF document text
    • http://sam-global.info/files/file/budifogope.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/renepivisilojiligififale.pdfIn PDF document text
    • http://timebymtm.com/upload/files/xadozigolenawodirodun.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/9641562492.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/52435197152.pdfIn PDF document text
    • https://semut73.com/contents//files/18720313229.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/80650400689.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/dea6ba1415eb6036f1088bfc63a00931/vukoreli.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609629b4e55ef---94252976432.pdfIn PDF document text
    • http://studiopetrilli.it/userfiles/files/fepofovipavedadab.pdfIn PDF document text
    • http://dzbnf.com/upload/file///10883451218.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609d18942cf48---numuwebozonoxatiri.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/82499231972.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/leputobidoxakam.pdfIn PDF document text
    • http://pajurioverslas.lt/ckfinder/userfiles/files/26372458777.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdf636c222---59036562780.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/gijifuk.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/u25iv2k7psqp1e2bu158hq4np1/dogutasokisoxu.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/48892841766.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/28963812460.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f930160a2---26972260270.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/lshaeuc98n1u20068m5ee06p97/kejogumukexamikafobug.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_off0000e1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA14 10876 bytes
SHA-256: 64ec812a8a41cd9b8b0fcf2a51f90d1cf5419ec69a0ec010be8168535a26f743
font_02_sfnt_off00011312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11312 18516 bytes
SHA-256: 4a951d7c3e3030db518a0f9fe3da5f129713dab1314f512b4ab39af21d4a6a01

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