Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee6f00cfeaad1df…

MALICIOUS

PDF

86.2 KB Created: 2021-07-09 05:33:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aa960cd1d08304e891d064944a92e011 SHA-1: 2e53835e8869ea31cb2957c91a59a64e28b27fc5 SHA-256: 0ee6f00cfeaad1dfee21dcdfb5ef1c7c0a1b58bdc9cc7db9e58cee2e9ae60690
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting it functions as a link farm for SEO manipulation or to host malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a deliberate effort to distribute links across various potentially compromised web presences. No scripts were extracted, but the structure strongly suggests a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/c48153fb245f77f49dd1b89f8215c5e3/xatikujirujekuj.pdf
    • http://chinasoftcore.com/userfiles/file///nesuxutigi.pdf
    • http://accessiblevehicleservices.com/userfiles/file/79431547405.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efdf1a77ac---10734080973.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/e24tsubtciim3uqkerudjicm3g/metepopaloruduxo.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7db547bd2---vurazinedavifezupaporag.pdf
    • http://lamorenj.com/userfiles/files/8691761229.pdf
    • http://cuatro-pr.org/sites/default/files/file/51564780565.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade5d752bff---jijumakubizuzopok.pdf
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/16698637007.pdf
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/95670361661.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc5a62d444---90125081663.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1608131e5365f0---9110656289.pdf
    • http://arcomproltd.com/userfiles/file/linepifagezepavavag.pdf
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/s58juqqsiq54oohvqlqcs961ls/17091272626.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af697a7db79---torerojevuzirelowafiwur.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a8719dd91f4---99971283062.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec984042fb---35165171988.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813f1f20c6c---bumone.pdf
    • http://worldofpacifiers.com/editor_uploads/system/files/57511406687.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608437e18fe2b---79841824792.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b658544bc---mamama.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=house+of+the+night+novels+in+order
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/be33c6cf6e30a353eff0ecb72a9ad24a/mijelunixosagevepesisil.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec90.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC90 16792 bytes
font_01_sfnt_off000104a7.bin
8d27c9e8ba7f00dbc6d36ef1c2e2900d9beddedfb9b8f55428bdedadcb677d6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x104A7 10628 bytes
font_02_sfnt_off00011cb2.bin
e173b44b81524fc89ed88c7dd4d2752e1da516cddabfa9968b5589a4727e1077
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB2 17812 bytes