Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f9473d09b81a44…

MALICIOUS

PDF

86.4 KB Created: 2021-07-05 10:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: af4042bd8807945fb99a154baa3ab689 SHA-1: 438cf1bc63682016bbc9ae6cdb043498180e77eb SHA-256: 01f9473d09b81a442da7be5dbd6de11199bf52d25c6cd20e4685ca48a0bf4ff7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it's part of a link farm or phishing campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, likely aiming to redirect users to malicious content or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=there+is+power+in+the+name+of+jesus+guitar+chords PDF link annotation
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/d302e5eef47655c5255c44d87d58ba3d/88470368672.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/36405594786.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/1b184c5cf11cc3d2a04c6a8df4ae6c73/jofuxopesi.pdfIn PDF document text
    • https://mindspacepsytherapy.com/upload/ckfinder_temp/files/20210603132515.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/e38b90024f2d78b703909d6d463f748e/nitanifegi.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/or3lprlmoido9la9q7a0pn1qf2/7553874531.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907f00d50da---xijovumiwerujowefebizepas.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/xilejapakil.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/o4pd7nj3oe08ag7r48ilikkhq7/guverilokagunususuladidel.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/57aeb84a9d7d83aacd48b5113b968b5d/ramowupamajuru.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/40851172901.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/sakufepivodubit.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/86319112899.pdfIn PDF document text
    • http://ucity1967.com/clients/f/f9/f95c10655bf48216a4b8c8e4321ec146/File/kinozevuvelalodonixi.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16098057f24924---29090003680.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/388673e9953afbe3d881b7ee3db7d639/lajopegusesubutukokit.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4pls66u48vlcsa85vg25ed1dl5/jigazatoridupup.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16070fa41c44ce---89916877597.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d64a5334178---61177006673.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/ab1fb7f643965d9a5c22368204ecf385/25570368759.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/49570059143.pdfIn PDF document text
    • https://melz-feu.ru/upload/xaxepekibowaz.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/4632336086.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/xirogawomufukepokesukarif.pdfIn PDF document text
    • 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_off0000e9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DA 11300 bytes
SHA-256: b10ac10deb105d702f1441c163eaab592f2ab3e1d7e2183b4500541ce4433353
font_01_sfnt_off00010419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10419 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2B 17512 bytes
SHA-256: 909d63aaf7d248e7ffb72aad2347531c90267b993204532471445f5ab650edba

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