Malicious PDF — malware analysis report

Static analysis result for SHA-256 517e4f05b6fab906…

MALICIOUS

PDF

82.9 KB Created: 2021-06-18 09:34:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 579aae0eea0a2e537fe6f9f34784d6e7 SHA-1: 3cede10070f10d0589bf088c2671eb0707090820 SHA-256: 517e4f05b6fab906463cb5e00f7a111fcd38359c01f6ff7f828c3265e8a627e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of 'utm_term' parameters in some URLs indicates tracking or redirection, common in phishing campaigns. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cructi.ru/uplcv?utm_term=papi+jennifer+lopez+mp3+download PDF link annotation
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/2a52581d8c43d53fc4f0d97233d1b1f4/86096734887.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/0eadc97faec0d0d17666cc0431fe747f/jirukavitonuzadobazoxubi.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/ih023bscct0nsvta2g7ntfbbt3/47040836360.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160898328daaf7---todikosowop.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/17242076039.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/7372c1c50b603dc8e82d1f9769201b5d/21001074735.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074855f3d6e6---3622303348.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/4f035903ef32d80e0d0c2866fa28cc9f/71069815843.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/8104779521.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/pm7nvei7s7rl4q0eejmtuo5d13/38474895589.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/vemr418ckk68v87btphq89f296/xiginizofoxelojituxit.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/f67a694afbd3ecc47e31b4c843ddefe0/sotanuwebolozu.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/d9afb6e63a6e2c696146f46a3eca7648/pafuviwi.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/susozudumilekaro.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/rojigituxasawi.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/gezubaxivopinuf.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/ccboarnjoec0uaombnq0qt403d/wekisemesitanina.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CD 5392 bytes
SHA-256: f171ee20e3b7d0f72e294df6b2cc7e57fee0e5e2196b6c13aa2a51d15edac880
font_01_sfnt_off00011933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11933 11048 bytes
SHA-256: 85ff9a072bebd367f171f1e348d66dfea4f81053dc10137d7aae3cde3a55283a