Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce70edba2d520acc…

MALICIOUS

PDF

76.2 KB Created: 2021-07-19 22:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4d8b761b00ab50f1bdb4156e02b5a2c1 SHA-1: 82ce8f091d066e7086a2f328fa874f43c972ab3d SHA-256: ce70edba2d520acc629e5d6905878e8128052a07698122666a4aaf279882a37a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 http://kcde.kr/userfiles/file/68113173725.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b36c826b4b---sigexerugorop.pdf
    • http://nesthomes.in/userfiles/file/kepeditonifara.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/via8ug6nrd17d96ree0d57op3u/dijitaguwuruj.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/0431571a3735ee892f58612d71d47b90/41884391210.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a82dcbe55---vewapare.pdf
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea7a05baed---99725312617.pdf
    • http://promador.pl/userfiles/file/61234480006.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/1bcb5f59d430483a396ef6bdf43ac6d3/26365380202.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3192c6237---monexeramumunuvezenivit.pdf
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/740fc7f216223e6222736f88b9969c93/moduwarajafugidowakoxilik.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16093acbf79521---79164709430.pdf
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/29820637840.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/0329a920dfb4d2f86b82a8b6951cdc76/94277242886.pdf
    • http://mesahighclassof64.com/clients/874441/File/18925559646.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16089b262a7cf0---49099133013.pdf
    • http://vienkiemis.lt/app/webroot/uploads/userfiles/files/bujekaxamubibifisiki.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/86mn568bvi4s6renskt21ji97v/rejopanudibozoropelado.pdf
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa015d317b---pezuxitabegiwonodinoxe.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/2nh54rtmhbnevlescsgdirebr9/32286838454.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=tom+and+jerry+the+zoot+cat
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c541.bin
448e194aeaac327708e0a08e3c05d31a86b489ffd7bd59aa123f45a9a13f11b4
pdf-font-stream PDF embedded font (sfnt) at offset 0xC541 17632 bytes
font_01_sfnt_off0000f3bc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BC 16792 bytes
font_02_sfnt_off00010bd3.bin
74b1519cf6eef5c8da8b57a954dffcfdc160eb18bc9e4818d3538945b91b5685
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD3 10596 bytes