Malicious PDF — malware analysis report

Static analysis result for SHA-256 7474c5c31751564a…

MALICIOUS

PDF

110.6 KB Created: 2021-08-10 00:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cc84e6f8e945057d45b5b1e6039a686a SHA-1: a0481fef8740c63bc511babeaad759f64021407c SHA-256: 7474c5c31751564a3482a0fc28d3747dd599a54570ca0577697862f84fa4cc2d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URIs and link farms pointing to compromised CMS uploads and disposable hosting, indicating an attempt to redirect users to malicious content. The document body is unreadable, but the heuristics strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9630

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=astro+boy+movie+in+tamil PDF link annotation
    • https://batikatravels.com/userfiles/file/wamefonur.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb2ad2cbf3---mipitowonitaniza.pdfIn PDF document text
    • http://preciseenergygroup.com/media/bikirize.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/tadavodezagozajanavuz.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/f9kfm5ej6vemq8tes0erap3kms/tomilojo.pdfIn PDF document text
    • http://starinviter.com/ckimagefiles/dimuzepave.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec61f2e096---89747706418.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/jafaxele.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607e17a380a5f---28805037277.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/rivupodonomomovuniposox.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210525143139_1590740241.pdfIn PDF document text
    • http://emmanuelmissionarybaptist.com/clients/74938/File/6975840866.pdfIn PDF document text
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/fe87066414302e8b3754f0b0bd3ed8cc/vegitarulu.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/n3v6d0fjj0j2o0952f2s2cllb3/rufimijexitebapovodude.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b732745508f---fevodozusesusesa.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160978a258f2d9---92801713652.pdfIn PDF document text
    • http://myboydfamily.com/clients/7/7f/7f513a2250c12de81a70a6735749c289/File/63179973676.pdfIn PDF document text
    • https://tidaksusah.com/contents//files/gowaxoko.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b14818b0a4---68950886665.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1aa7c068e---jifudejafupevo.pdfIn PDF document text
    • https://topupdana.com/contents//files/viguvo.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071e1b958d82---299239998.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bda3d2c7e08---13339360382.pdfIn PDF document text
    • http://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/kalewosedirivafuronugogiw.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7cac6c54a---75009391941.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/97525025775.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF8 19252 bytes
SHA-256: 7a05dca1c6c480a0d1ea0695c1a64a6ec4b8c0e0978282515c6d0b8b7769496e
font_01_sfnt_off0001730c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1730C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B19 1900 bytes
SHA-256: b8eedeffc303498e7fd44fe2a6a2493b4929c0d4b1bb84c0d76beb7a03055db9
font_03_sfnt_off000193fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193FE 10572 bytes
SHA-256: e4f7da1396b180e9bba81dc3bef229ce509469cb5f44c8516cd009e880fe3e83

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