Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db95a7d99606971…

MALICIOUS

PDF

87.2 KB Created: 2021-07-05 15:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 92c381174be232c8232e078cca45c675 SHA-1: e8003aff7ea8994e4f9b2a62c7bc4736a991090b SHA-256: 0db95a7d9960697110f80af77c064ba8a432e460a6d72e8bc36959fe8074d8a9
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. The file's structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://queure.ru/uplcv?utm_term=how+long+is+chicken+breast+good+for+after+sell+by+date PDF link annotation
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/4c6f9741b3aefe8128d29a3a3d8f5a55/kizamakawe.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/8487119608.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/7a6314a67df0a03f90a4d0ae5d4e25e9/12733795355.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/bogetagasi.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/61f50fc6050d6784dbeba35c8d91cd0b/jarigifatuziluripedan.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/3d1aa4d6609b98f3d81ecc63a613a823/tuzuwezasewidikefigixede.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/vudolivisirubo.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081752da7434---17108100227.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55ad664731---wuferaxus.pdfIn PDF document text
    • http://3sdent.com/upload/files/79967908845.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/monagogujegil.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/fm5it7j3bps0rkl85v0tjh61ks/gifebojebifibadifepusi.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/i25a47e17pauvvm49cmoo98dk2/82878909339.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/g6u87bae12sf557u9jst9thi9v/69098374997.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/gi76qa37dh522oe85rq2c4un0s/tuvuxedotaraz.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ordf7nqmkfcjqov85rendqma12/salofadamagilaniloratuzi.pdfIn PDF document text
    • https://nevisnews.com/userfiles/62669634743.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609644d13334a---53227099951.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/v2lvrfaiarh292fcuf3oorc5ks/72322064449.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0515555a1---pivujulagusazitovibefaz.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fa8e25902---daget.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/8f65e7169779dec9b3ee1e618b280192/neduj.pdfIn PDF document text
    • http://alaskacounseling.org/clients/8/87/870ae3779d21e956d596131c1dd113ff/File/siwuwapanosup.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/xevurokuriz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07D 17152 bytes
SHA-256: fc4caac7d40fbc494ec353a57d84369da4c4a09ec6c8cd589412dc344ee605b1
font_01_sfnt_off00011ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE0 11176 bytes
SHA-256: 30be08347d4b6fa38b0a62c2cb9c26b8c1558294ef7b06d86cb0b929a3f1d253
font_02_sfnt_off000136d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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