Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6dac86d10da6df3…

MALICIOUS

PDF

86.4 KB Created: 2021-06-30 01:02:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ed2d7181fcf073f158017f5a53f4fa68 SHA-1: ab9c856bbf2e97588bfe1c2d9617f9de90b4cba9 SHA-256: f6dac86d10da6df3d0770d9ddb1c87e432ceb4512e47fca1db08173deb77aba6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, pointing to numerous URLs hosted on compromised CMS uploads and disposable hosting. These links are likely intended to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://binarbaidrealestate.com/public_html/userfiles/file/sasugesosibukifiwa.pdf
    • http://www.toptehnik.si/images/xejegawa.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/c0ac80b06e191bcec15439e18e5d2925/42631561384.pdf
    • https://kompaspt1.com/contents//files/wivedenivebi.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608737fa1db72---61882589541.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/88e6tm11ttr6knjfigjgv2p2s6/80088417932.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b0aa67252---kidawekapujusake.pdf
    • https://itacademyindia.com/ckfinder/userfiles/files/zodudunaguluzofaben.pdf
    • http://learningkey.org/userfiles/77452435399.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076184395855---rujisawamogesafuz.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b2f311f98---rinawalinow.pdf
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210620_AFF9E6DC01F86957.pdf
    • https://nguyenvanhuongloc.vn/app/webroot/files/images/pages/files/16188035425.pdf
    • http://files.ibiza-ferien.de/file/57014213336.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/ea8f5bd5a858985845070e109bf30a94/68179799574.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a793d3895---sesovomariwuben.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc207b1e65---burinigexeponiwuwu.pdf
    • http://jarosi.hu/files/file/zelijovof.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c295c52113b---zobix.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c039f9b3301---21459520218.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a7c8c4ce0---papeliwivigopo.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a5dc5385acc---zugitudezodusafezox.pdf
    • http://arcomproltd.com/userfiles/file/wisub.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f99e9f8f8---jomiwepedotowepebelos.pdf
    • http://solarhomepage.ch/fckeditor/editor/images/file/77048263591.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/9c2da64a18e7384ee30577f4116feb38/totidavilomaxupubesavebi.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7cedf2ca4---vofopexij.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+much+in+shot
    • 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_off0000f02c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF02C 16792 bytes
font_01_sfnt_off00010843.bin
872a88cde0b3ad303ac482c0b2f194a28c9446df44272456e47158deec9540f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10843 10232 bytes
font_02_sfnt_off00011f14.bin
79eee4dfe10ec37fd3d74f66ce40ad83280d6d12db86a5be42636dae922109a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F14 17468 bytes

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