Malicious PDF — malware analysis report

Static analysis result for SHA-256 4680c2b0b4e1a2e4…

MALICIOUS

PDF

82.9 KB Created: 2021-07-19 10:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ba699438bf41ca7df99daa0cad1a488 SHA-1: 3f615ba2cf52d26b65d4f87f32f52332cca082c8 SHA-256: 4680c2b0b4e1a2e479da56fe5a12bd889d76cfc1fb7354f5323747c17ba5242c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm hosted on compromised WordPress sites, a common technique for distributing malware or directing users to phishing sites. While no scripts were explicitly extracted, the nature of the links suggests potential for JavaScript execution or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b4071eae7a4---24425354485.pdf
    • https://www.totalblissbeauty.com.au/application/third_party/ckfinder/userfiles/files/28839600661.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/mvg8sev90cq6955k91dej8b4a2/pipegurapiforavoked.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075283049b91---68833865223.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/cefls07ea0fhm12npmdfjldpc9/24480666118.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/9cc94e4fe77104dcaa7b7db9432e5f67/55612768657.pdf
    • http://wirheiraten.de/images/file/rujogafulumu.pdf
    • https://businesslife.com/content/file/54014750850.pdf
    • https://fnb-concepts.com/images/uploads/files/36681723677.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/c275e291f24550f424fa9a277b6635cd/49623558908.pdf
    • http://kameleonhastanc.hu/files/file/tameg.pdf
    • https://hondamienbac.vn/userfiles/file/86869971142.pdf
    • http://concilianavarra.com/userfiles/files/divinifuxolerer.pdf
    • http://dabbleanddesign.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/86727137668.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/491a85c71d334186d61dd473be631087/fabagitax.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/b2d6341648d555888af5d8110a0350c9/luzipewirorivox.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/c3e2f6e3a057428457a78a1d92cae0c0/27637076367.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/soeb3t120cqhgcumo4399l3qlg/12252576474.pdf
    • https://delaneyllc.com/ckfinder/userfiles/files/femotez.pdf
    • https://electrabicycles.pl/app/webroot/uploads/file/16210964264536.pdf
    • http://shesob.com/file/files/29186135936.pdf
    • http://focostrade.com/files/20210705064307.pdf
    • http://ya-ke.cn/admin/upload/22853837419.pdf
    • http://hondasushi.com/uploads/files/madabeweb.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819e7dcc53b---38965748389.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/5hjb17fq6o6gvktnfoq5drjbjj/tofewiza.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=meaning+of+golgi+apparatus
    • 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_off0000e04d.bin
2ccf8a66f02c153b94f782414709f77c903e42bf1fcfa96ecb3069bfa962ccd4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE04D 17388 bytes
font_01_sfnt_off00010d9f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9F 16792 bytes
font_02_sfnt_off000125b6.bin
9a2b5fa718df8379643f889024fc464748ebb30a2c60ab17b6fe463e7e892074
pdf-font-stream PDF embedded font (sfnt) at offset 0x125B6 10628 bytes