Malicious PDF — malware analysis report

Static analysis result for SHA-256 3001d4fc3f748e8b…

MALICIOUS

PDF

81.2 KB Created: 2021-07-21 12:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a74301252c254240ad59435a74deb832 SHA-1: 3438f4f9c318b6b8d94bad0568c698f5cd97f7df SHA-256: 3001d4fc3f748e8beba069fb621cc69f2467f58d41733c4b1803cc4d1e0ef42b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, likely facilitates the redirection or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bd4ac62fa---67371990935.pdf In PDF document text
    • https://activepymes.com/pub/file/zekedalodejokifopix.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/54156365831.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a5477f8dc---3142122357.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c92b883b2f---96859550793.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf735f69025---kefutupatuwen.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b87b0986216---20092754451.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/ditisabumilapi.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3a6380fe1---39931480197.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/16531233327.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/60afdd8404d0230f27fb412598435ec4/79923075496.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/jobumojujofusiketozuril.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/tixosameduv.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c51ec9c183c---36482426152.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/jj5thn5cqvf17lksou9ldjh936/81871240447.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/d866efd918bd799716a06fe075a96580/vusifazetupasitoj.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9bf8f249e9---muxogukezetupamaf.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/gktc4271355ufa7sai479310m6/doxufelixotadobitufu.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/4602491223.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/t1m9ctn2qpgnb69rs5bugbh181/370353087.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af7cf92eb1---44622017432.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/duzedusesizufogel.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/mofofizoxibazapidegepivi.pdfIn PDF document text
    • https://akvaguru.hu/user/file/70804452026.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/pijutofuwetunavi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=good+morning+images+hd+quotesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA82 17000 bytes
SHA-256: 0ea656041a8472f787571873f3c4ed3987339c2f4a2c83d98e33629ac37a9019
font_01_sfnt_off000106cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CF 10932 bytes
SHA-256: beb56061666fee355e01cf1e3064a2e39587e8388b865ea090f799a53d5d29e8
font_02_sfnt_off00011f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1