Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac1182213211de7a…

MALICIOUS

PDF

69.0 KB Created: 2021-09-26 01:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6137f8e862c6606299996e4a92fbb066 SHA-1: 740ee2814c840d217445b554e4e246f25b7bb2e3 SHA-256: ac1182213211de7a41c88504f8bd24671219f4ba2c4004e0cca42ee70f6c0b4b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an image-only interface with a clickable action, designed to trick users into navigating to external URLs. The document body is heavily obfuscated and unreadable, but the presence of numerous links to potentially compromised CMS uploads and disposable hosting suggests an attempt to distribute further malicious content or conduct phishing. No scripts were extracted, but the overall structure points to a common tactic of using deceptive documents to initiate user interaction with malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://royalgoodviewresort.com/Uploads/file/xejisudutaz.pdf
    • https://www.hippocratio.gr/ckfinder/userfiles/files/sofadomuxe.pdf
    • http://lishasurgical.in/ckeditor/ckfinder/userfiles/files/fegugiwuxo.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16142816c8c820---67326626144.pdf
    • http://busangh.com/attfile/fckimg/file///20210906105556_730168823.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/1avnd95ncg6r8m6m30u23fo0c4/bikut.pdf
    • https://rubin2000-distribuitorshop.ro/userfiles/file/88250874936.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e13a84447b---4894093873.pdf
    • http://studiodugnani.it/userfiles/files/warowasug.pdf
    • http://profil-metall.de/content/uploads/file/nasifimusurusimaluko.pdf
    • http://allivecoat.com/userData/board/file/7792514079.pdf
    • http://greddy.com/admin/common/ckfinder/userfiles/File/86813014387.pdf
    • http://abwbaltimore.com/uploads/files/57618105173.pdf
    • http://aurangabadptti.com/ckeditor/ckfinder/userfiles/files/61093790159.pdf
    • https://aedwea.com/upload/foto/97571606506.pdf
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/59280513878.pdf
    • https://ku4ysk-9lgp4y.com/contents/files/38256741007.pdf
    • http://dichvu12h.net/userfiles/file/62413710757.pdf
    • http://proxima-design.cz/files/file/merefafonebuxes.pdf
    • http://aromaonly1.com/yamituki-n/uploads/files/sexon.pdf
    • http://baheth24aqari.com/ckfinder/userfiles/files/56853532477.pdf
    • https://beytarimcilik.com/admin/editor_resim/file/wejoxi.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f639b0f1e4---bezape.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff454d0f65---posudaralavo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=princess+princess+ever+after+free+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_off0000b28a.bin
9ed3c279d2bd3584107201d70f05628c07afb47283ce707afe59dd511e2e4198
pdf-font-stream PDF embedded font (sfnt) at offset 0xB28A 10512 bytes
font_01_sfnt_off0000ca97.bin
0149ef0739ee910ca6f8738f35a90c0282c512856b0697818cfaac09fbfbe9b5
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA97 14292 bytes
font_02_sfnt_off0000ee2c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2C 16792 bytes