Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe517f3bc647a98…

MALICIOUS

PDF

94.5 KB Created: 2021-08-04 11:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c254c295a61c9243673cf19d7933edd7 SHA-1: c0084645068fa2f4f95da39932eae6b2b2f639c9 SHA-256: 6fe517f3bc647a982327771cee8f642f3bc6cb0edcff803e6be692ba7868d993
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://adance0112.com/upfile/editor/file/53127085051.pdf In PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095edeb8df5a---44381491588.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/saxatomuwerazizopelam.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4426ad41d---58244920746.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/b8f18e9e8b1ea40806f4ef14d4c98d8c/35164515873.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/32449202290.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/v5npisjmpo3ehcjojpiiouipmc/96771866918.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/vk3gannh1frb1rv7erctqt3hed/tuxeninufupagawumamezinu.pdfIn PDF document text
    • https://mollis.rs//files/wewiravow.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/8em59a8i4o6j6u08ta7inmnbhf/27737571177.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/8651586710.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/l6516s71ltm3hs4t5qmr1joqve/durevoxogolenova.pdfIn PDF document text
    • https://jagamimpi.org/contents//files/madimuzodefezevo.pdfIn PDF document text
    • http://safarang.com/basefile/files/77169056722.pdfIn PDF document text
    • http://nomaquito-travel.com/editor-images/vuroza.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/v2bqg36bsmbe8rknrh2g0ifjn4/14455469838.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608254fbd01d0---860552867.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0c546189a---gixunaju.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082062214b2f---5309301190.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/f77dd8b9c124277bfa175663ccc3d255/nuvosakabuxufijujezoz.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/pokig.pdfIn PDF document text
    • http://nctpa.biz/clients/5/51/51e593b678cc4707ea5ff7b662bcbdb9/File/53162003595.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=sbi+mudra+loan+form+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F6 16228 bytes
SHA-256: f2666e95f4599b990980a0abf2f374fe3006e34437484733904d739abeeb93bf
font_01_sfnt_off00010cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EC 17768 bytes
SHA-256: 24262150db7dc285a4d1f440f7970984a4bf807d10b1cb3ca54799113af22c24
font_03_sfnt_off00015389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15389 10576 bytes
SHA-256: 81e7712e28eb9257a1a1216fa9f085fb1a4540aa0dd44815af63c073b92eafe9

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