Malicious PDF — malware analysis report

Static analysis result for SHA-256 92fd7b4a2c7fca04…

MALICIOUS

PDF

87.8 KB Created: 2021-08-08 13:29:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 66aabeefb0876b2e8cfc2d28bef927e5 SHA-1: 5110566046e8ed66c64262de027864525db43005 SHA-256: 92fd7b4a2c7fca048fcfdc1cf9ff94b116e328cee069901d3ea3dcc0d6cd9a06
156 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to lure users to potentially malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/uplcv?utm_term=samsung+diamond+washing+machine+error+code+se PDF link annotation
    • https://rajatotogroup2.com/contents//files/juzejimogasazodefakedegux.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/supajdj6gcac78v7j3un1sle78/83188708593.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3ff76574a---mufufezagabetenowebe.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/6cbfbeda0be37ea58f2ea89345d780b9/mimexidenutiwotemazamit.pdfIn PDF document text
    • https://campermagazine.tv/public/file/binujolagevuxame.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/69627534649.pdfIn PDF document text
    • http://ctnphrae.com/ckfinder/userfiles/files/21870015407.pdfIn PDF document text
    • https://plasy.com/uploads/file/29377010895.pdfIn PDF document text
    • https://vettercycles.ch/userfiles/files/simexeriraboz.pdfIn PDF document text
    • http://50wj66.com/clients/a/af/af9d65f11c1965a5434adcd4cd578f00/File/1371365024.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/jn5po0kb0no7fpe0k84gvrc9o6/sowaboxed.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/19478456478.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/19725353876.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090586aa1de9---wakadovinev.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/mejajirixele.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/287e52b7ca2483db83face5ca1dae93b/81651483393.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/98d7d9ee1cc6d49a5479ba6284db526c/detemixukudejakiwi.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078b53074e6a---vibalojudovajaf.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/70139432443.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/52023890493.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cc5e127a819---jovuzajosuxoverubokutumi.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/miradekiwozewane.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/9f725208e2860ace09747afbd35d4ed8/wikiwatozafinupodafode.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_off0000f0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BF 17660 bytes
SHA-256: 46f65056fc89add711e377c889b40980fe8bd6fcf1b648dbbf2d66e48902dcd8
font_02_sfnt_off00013633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13633 10932 bytes
SHA-256: 4823eecfe6301bc02e3d2fd00840c1cd5601a61fcc433bea733557310bdca2ee

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