Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c948c141b1ca1a…

MALICIOUS

PDF

78.2 KB Created: 2021-09-21 21:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3f71276658bff1fb875bc6101a639ab7 SHA-1: ebe31eb03eb326a4d6adef2f1c4afe5cd53a070d SHA-256: d0c948c141b1ca1aee881692fc19cf5a4f08b6784301ffec9ff43b2a598574dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution campaign. The presence of a 'roblox accounts generator' lure indicates a social engineering attempt to direct users to malicious content. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://philabc.ru/uplcv?utm_term=roblox+accounts+generator PDF link annotation
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16143c4a98f318---bavufabudikofupom.pdfIn PDF document text
    • https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/subiwunene.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/56986667777.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16141d1ccdc810---16873548499.pdfIn PDF document text
    • https://commonlawhouse.in/userfiles/file/powogorudupenug.pdfIn PDF document text
    • https://rainbowprinter.com/app/webroot/files/file/99140158833.pdfIn PDF document text
    • http://manvilastrust-org.bvirani.com/ckfinder/userfiles/files/rilixuzuvupolakadifok.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/23ec51f64c6937ee7f4cd19ada4613f2/81041383142.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/dijekigonululiliwovexesi.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149778927d94---zogebixuwale.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/datoletevojux.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/119597869.pdfIn PDF document text
    • http://laserbeautymachine.net/d/files/fujabek.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/bebujobipinujov.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/5332176840.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/40369894902.pdfIn PDF document text
    • http://malifer.hu/upload/file/30698000629.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/finigelamadofok.pdfIn PDF document text
    • http://anquocrealty.com/uploads/image/files/dawuvusif.pdfIn PDF document text
    • https://mp2020.csysadmin.com/ckfinder/userfiles/files/nibonibogigudefuderabakib.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/16229218755.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/32166107596.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_off0000d21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21B 15664 bytes
SHA-256: 1270798ed8fd5a281651810897c7b763a2bf2d15c7f2e4d1267a7bf11153f11b
font_01_sfnt_off0000fa3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3A 10700 bytes
SHA-256: b4e4b330b2053c8728e9f2ef5b2cf811a77d0097aa91212c24daea075e29f90a
font_02_sfnt_off00011310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11310 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1