Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4445d7e33d007e…

MALICIOUS

PDF

82.9 KB Created: 2021-08-29 14:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7708074903f1c6c00b17a386652ec95b SHA-1: bd99561941f76e47044a6c6fed2d5318165eeccf SHA-256: 0d4445d7e33d007e7543eb25a34454d6284c8f264ab2e45b3939b74038700681
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm designed to redirect users to potentially malicious sites. ClamAV and ML classifiers confirm its malicious nature, flagging it as a phishing trojan. No scripts were extracted, but the structure and URL analysis strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/20274429940.pdf In PDF document text
    • https://vestol.bg/files/file/lezuw.pdfIn PDF document text
    • https://techlan.pl/files/file/52290087168.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/167972809887dd6fc62918e640f76379/97865786185.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/2p8te1c2g07hpvg4rb15llisj1/16664888435.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/ba04db4e9d7c02fb7af99106c09bf4fa/10499796848.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/28401431822.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160856d38357e1---delubewageket.pdfIn PDF document text
    • https://digireg.nz/upload/zomumid.pdfIn PDF document text
    • https://www.campacinter.com/image/upload/File/nududonulir.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/9ojp9d0munelulo74okea18eb5/laruvup.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/f7fe14f5ab2f00ab95ecb502d55ff320/25257925448.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/11740862218.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/n7r2uvmbqjn0lg0u18tb9pmsrf/bupaweruxifiwijugewol.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/50227482224.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/95580800332.pdfIn PDF document text
    • http://arablift.net/userfiles/file/36145615362.pdfIn PDF document text
    • http://foodchemsino.com/d/files/nuzagep.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/c8a01b7b073cdb72b957ab073622e486/58345182962.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/retawawup.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2a4f5c5cf8---nasimivoz.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/71229e38f73194726588c4aa4816b3b8/15335034817.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/23725174259.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9248dc6c1---90088973637.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=bring+people+together+synonymPDF 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_off0000de73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68A 10704 bytes
SHA-256: e845fd0ea55523b035ff964cf8ed60b0955b490942e399802a47fa6a215f43f9
font_02_sfnt_off00010ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE6 18672 bytes
SHA-256: c23dde7dd2c3b19aa386e11e8e6c87ccd87af46804bbec985e3ac8ed411a9081

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