Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa695fb001cee47…

MALICIOUS

PDF

85.9 KB Created: 2021-07-19 17:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dfc4a59f2056cc6078707b75b9ccd7f0 SHA-1: 3517088584f75c3bac44140134be30229f0bd079 SHA-256: 8fa695fb001cee47de07c67e8c46243137606e6c2f4c2e25187bcb4f3f163f55
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document exhibits characteristics of a phishing lure, indicated by a link farm pointing to compromised WordPress upload storage. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further malware or submitting sensitive information. The presence of numerous external links, many on disposable hosting, reinforces the phishing and link-farming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://hungbuloon.com/media/ftp/file/45130645424.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989fa93358f---fivijozesowo.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160daaac2eaf77---kepati.pdf
    • https://fizjolech.pl/userfiles/file/84165276122.pdf
    • http://rayhovietnam.vn/upload/files/37728600862.pdf
    • http://hanarotalk.com/userfiles/file///83836865096.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942aca19a36---xegisetokevuwigadelarokar.pdf
    • http://ndt-tl.ru/upload/file/jazupadozipisap.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077675438e54---50863554781.pdf
    • http://worldplastsolution.com/ckfinder/userfiles/files/lozefo.pdf
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/10717198393.pdf
    • http://vmkmsz.hu/userfiles/file/vitenigomidol.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4728ec7e7---dezexewo.pdf
    • http://resetimpianti.it/reset/public/file/43598558824.pdf
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/buwepiz.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3975a7170---64631099.pdf
    • http://vnationwide.com/userfiles/files/lukonopusuwagoka.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/d1e266d1b41e99b6a97383fa974f7440/wizewumawabowoze.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/e76c04ef35df8bdf01ecf7acef980f9c/pajigobenurupuvinu.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/05c50b0f45eba21a945bb990564cef03/misite.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160763638c41b4---14798381899.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/ea858f097af017c34f3eb2952fd88837/petalupamifemeget.pdf
    • https://techson-cctv.com/upload/file/wamokotekewazekij.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/9f9e9cc4b7636910906f1e94b406a7a0/mokoxikixa.pdf
    • http://ekotronic.eu/files/file/muwunazofimerinot.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=isc+class+11+geography+book+pdf
    • 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_off0000eec5.bin
f5e46a792493761549a74b47784be200e3bfdf2b8f7a80563cda01e455ff11a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC5 10952 bytes
font_01_sfnt_off000107fd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107FD 16792 bytes
font_02_sfnt_off0001200f.bin
827d5c7d858ce65d65cc913cfc8c20ff375005789090aa4651538306be09663b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1200F 16240 bytes