Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4e5b2334a9729a…

MALICIOUS

PDF

228.2 KB Created: 2021-06-10 17:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 444864d11888e2937eee9447430d5d9f SHA-1: fab7c9d71cd527735f42e676fdc9617d506cf4f3 SHA-256: 0b4e5b2334a9729acacea1b562dbedb9e2b12635c0089b33a8a339a60259b3ab
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious content. It contains numerous embedded URLs, many pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The presence of external URIs and compromised CMS upload links indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://huntic.ru/uplcv?utm_term=armada+movie+ernest+cline PDF link annotation
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/d6bfa5c9108d64c0e1e73203ae0b1c55/pobugixiwuvikiwevaja.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afae96c672f---bexux.pdfIn PDF document text
    • http://bscartridge.com/pic/jobaguxidepavag.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b581881a756---buduvofetetewofikubon.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a396d381a46---57014302102.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/42ecedc06acba994eee09757f7fa914e/79899483818.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e37ce7bd0---jinafisutoxodut.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc23803aa3---mimitilogotaj.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/43067983040.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbce16992e---93933801732.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2474c529420774ff826e221c1db75754/nofiwusukajodubuges.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/49278767598.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/6db0694984ab304a1d5e11147e603a50/28934238546.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/50f31a9a04e46401e15330e798227f6a/lemuw.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609410dee8cd3---97978723106.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/xizixovagenurezaret.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16074d3d2931f1---pozedijevomitubabuxa.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/70558649115.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_off00034811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34811 5136 bytes
SHA-256: 43138ff6dd4112df7a84a23a6bdf2c217e5723e9ee5975f1a46de7f1d761fafe
font_01_sfnt_off00035971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35971 12740 bytes
SHA-256: 718a214abf936df49f73049eed98ce20d3dc24c0dae8a8300f3d24b2aa6a950c

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