Malicious PDF — malware analysis report

Static analysis result for SHA-256 f222717d2c05ff26…

MALICIOUS

PDF

88.6 KB Created: 2021-06-28 08:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6c2621ddcedf1d941c03dddb0ee5b84e SHA-1: f9ebf522e10ed42de3eef5d6011a5c900bb575c6 SHA-256: f222717d2c05ff26d1091a25f58aa64f5ebef9c6e2ad92dbfc7291b37f02856b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. The presence of numerous distinct hosts and links indicates a broad distribution or obfuscation strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4a1ff2f16---toponebow.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe3d773e5f---6903464132.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/pfu8kqento41qmaoo5fpvh4oha/tiwezogogexawokemuma.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b84d1e8df6d---dogabowa.pdf
    • http://amandatravel.com/userfiles/file/31085616053.pdf
    • http://elite-nails.pl/Upload/file/nosimewuwoxedofila.pdf
    • https://stiff.pl/ckfinder/userfiles/files/76691133918.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b01e17c6f---xusezinawafowi.pdf
    • http://aimic.com/userfiles/file/75112982802.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6982ae8a9---3701655838.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/8ff35107778bd7df46ae61ea6af69ffe/magobu.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/qq29bga9m01t0ov82v4168ql0k/96482822901.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/04fbb6139f2d3a2d4c611dd48b27fc92/baledowekupegexu.pdf
    • http://skikk.be/app/webroot/files/userfiles/files/68050058439.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/f37670f458d544d230ceb498e9986641/lofegegelokusijisurabijot.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d0a9559792888593049324a8f00cf678/muzazi.pdf
    • https://kodcomputers.ro/2664/uploads/52170396856.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/2dbeqfdeeb22o1sephdq9qrptp/xepuji.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/0c5b822bbbdd111350ac0a9ddbefc296/kixuvukon.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b893674cb5c---62692062715.pdf
    • http://abwcrainhwy.com/uploads/files/texadobuna.pdf
    • http://aitrans.org/UploadFile/file/F1202106171748364741.pdf
    • https://bank-kredit.at/ckfinder/userfiles/files/gogureg.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3c5081526---mofirumilukuvafagixovoli.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc82356822---28434127057.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c88510d876---86043539019.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/6g1gq2l8hmnmsal0bi4p53luf4/73669229091.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=little+witch+academia+watch+online
    • 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_off0000f412.bin
b5acd2d2a946f47bcbfb5100540eae9a081ab0270d31428bed125b8b06c788ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF412 10408 bytes
font_01_sfnt_off00010b73.bin
6542eb9ed0a7608bd2eaa9e53d56d9248a0bc031395e7a62e1a33977458b195e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B73 18568 bytes
font_02_sfnt_off00013b54.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B54 16792 bytes

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