Malicious PDF — malware analysis report

Static analysis result for SHA-256 08af29c76b2b4e9f…

MALICIOUS

PDF

70.5 KB Created: 2021-06-21 02:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 59dc0f6cd568c139ca464e9cecd3cc2e SHA-1: 44ec3e58b96a777c112495057233bfbac4322b42 SHA-256: 08af29c76b2b4e9fc0ef11cacefeb24fce282d70f9fc058ed45df7feed553e85
156 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the structure and embedded URLs point towards a tactic of redirecting users to potentially harmful content.

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://oniceh.ru/uplcv?utm_term=kick+film+salman+khan+ki PDF link annotation
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce37f541ec---14693515092.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c502dcfe1---51889045512.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/68290251536.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/4488275448.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/mcima8ds5fg61ivj90uu5892qo/22338092776.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5886405ed8---92822014642.pdfIn PDF document text
    • http://rhondachem.com/d/files/tejijowuvita.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160713d6d4ad4c---kofatemosivezevagopes.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/fogaxagonolalaxosoxeke.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160a333a7b7227---18034081565.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f740df89f---61763552526.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/56037782de49902f98d86dafd02ece99/nujetizirefexus.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/78841585306.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/48057917360.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/12650398009.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/migida.pdfIn PDF document text
    • http://wajl.net/img/file/202161862646.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/gufipofizifosir.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_off0000d3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CA 5060 bytes
SHA-256: fb4c6583afe68008d6da3e5a09a6b5b7142e115f5884f1607a7d687afb583639
font_01_sfnt_off0000e4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E2 11284 bytes
SHA-256: d276fb0dbfa73898f1cc880d31abd5f839dc592cfaa413fa3cf5596a0d982c2f