Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6142b02fc7d0530…

MALICIOUS

PDF

70.7 KB Created: 2021-09-17 12:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 64e54cc950bb40229f61ac10aa6a9c68 SHA-1: 141aef5b30588619e028bc13a281a732fd5566e6 SHA-256: c6142b02fc7d053064529ef2262dccb3a77fbd541cd32b26a6fe658be8e0c2f9
154 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to redirect users to malicious content. The presence of external URI heuristics and compromised CMS upload links further supports its role in directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5983

Heuristics 5

  • 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
  • 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://medvor.ru/uplcv?utm_term=hamari+adhuri+kahani+full+movie+with+english+subtitles+123movies PDF link annotation
    • https://muratay.nl/userfiles/file/11526647819.pdfIn PDF document text
    • http://wsospice.org/uploads/userfiles/file/file/98714703321.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142f3789c980---finogivuribadu.pdfIn PDF document text
    • http://vino-charlie.cz/userfiles/file/80412191473.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/godepimofoke.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/tuvabawuto.pdfIn PDF document text
    • http://saeronbio.com/userData/board/file/90070012226.pdfIn PDF document text
    • http://thekreativecompany.com/uploaded_files/userfiles/files/70338646434.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f6ea441a5---40763256328.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dcc11cdab0---56861036836.pdfIn PDF document text
    • http://telektrans.hu/editor_up/65765489508.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/161443b5f4e38e---zamemufudukoxisejakel.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/sorilunelajudodeze.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/14042699171.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/6981a1bfbb33cc1d42f84236c723c8b5/25019767474.pdfIn PDF document text
    • http://dopuskvsro.ru/UserFiles/89525547314.pdfIn PDF document text
    • http://aromacosmetics.bg/assets/userfiles/file/doxud.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/verobilakavewowip.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4a926a05b---97053153077.pdfIn PDF document text
    • http://hla.vn/upload/files/48684696230.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/nopumufamobuwevixin.pdfIn PDF document text
    • http://the100voicesofgospel.ch/fichiers/newsletter/file/javale.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/lesexikajejejaxosono.pdfIn 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_off0000bef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF4 16280 bytes
SHA-256: 1b7c11ec478240d295afc5819324a6c73b111528254dac7b7d47627a87a75bea
font_01_sfnt_off0000e930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE930 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10147 11620 bytes
SHA-256: c078cc2ebdcd86372a681c771ae2bcc95037b4a31691c41d000eb6dbe4809465

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