Malicious PDF — malware analysis report

Static analysis result for SHA-256 96bc442434bdb85d…

MALICIOUS

PDF

124.7 KB Created: 2021-07-08 19:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 77a7256c647af303cb470458105315a2 SHA-1: 4c5e237b49a6c71dc8ddcacd60ea80f4db8d2d08 SHA-256: 96bc442434bdb85dce652bdf9cac2079c141dac1031723325bc2a1274878d341
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to lead users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9809

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://drafthe.ru/uplcv?utm_term=what+is+worship+in+new+testament PDF link annotation
    • https://caffedisanto.it/file/89214399781.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/c60b2647578507f13328f8e6aa50d7f6/86422391023.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba16a8edd23---69315688906.pdfIn PDF document text
    • http://4bx.pl/public/file/bexuwuwedijop.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/biniduvuxeli.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/f55f53d57ebf65094572a9f943bd8ea6/29181612349.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2259f49a0b---najutonikowetebesawabe.pdfIn PDF document text
    • https://dhesient.com/media/webololuvasiwa.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab20bc0ec87---sokojawopuzub.pdfIn PDF document text
    • http://onlineexpert.in/userfiles/file/60321979971.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf512aa53a---73889621876.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/jiganuteribiw.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607d72a363302---lanosuwijomil.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609406865bc19---lowusa.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d44768ea09---42786943923.pdfIn PDF document text
    • https://www.foundationofhope.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d84124926b---59417705461.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf83e536b4---tukiromojagegorilax.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/nuzoberuger.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/312c259aee9b137adeb84487dc62ed1e/porasefiguk.pdfIn PDF document text
    • https://xigmatek.com/upload/files/zuvogutezab.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16071786375085---14570689394.pdfIn PDF document text
    • http://apisicul.com/userfiles/files/78771778135.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/c990b9eadf3c3b400c0ae3e32a803e46/97306206550.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/m37pskrkmfmrec9vpk9es74los/kugifosugasinojatuxuke.pdfIn PDF document text
    • https://bachson.net/upload/file/5567752386.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_off00018901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18901 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001a118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A118 10548 bytes
SHA-256: f42a5663df4aaa71833a4138b38aceb918dd608cf089e32a96a50f85f19584d4
font_02_sfnt_off0001b906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B906 17320 bytes
SHA-256: fb91a196aa1268dc6579aef88ac267bfd58c90d538f8752b1fa60cae0310f1f3