Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee4a6179f6ca276…

MALICIOUS

PDF

92.9 KB Created: 2021-08-13 17:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 9430b2b5af585d3b41c2d11709b613bb SHA-1: ba98bdcf348760a142a6e730ce3c5092c43ac1ff SHA-256: 8ee4a6179f6ca2762b55e71f0af5263cff5024d87c5814f27bf8d356c0f364fb
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains a link farm pointing to numerous websites, many of which appear to be compromised WordPress installations or hosted on disposable domains. The primary purpose seems to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://alternativecarrepair.com/userfiles/file/negofuvusasajudugel.pdf In PDF document text
    • http://navigator-nsk.ru/userfiles/file/24141865091.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e7769a7078---newafizukerone.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/b9d20f7f301e3dfb5eb78809cdf1dfee/tinutireduxenaxowatoz.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160982a1f3a02d---bomilewasaluxuwakiteg.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f6b0264d7---12514693309.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/1f702bc439cb790ed2cbd70cf9884faf/bamexebalagiselonogezu.pdfIn PDF document text
    • http://hodori247.com/uploads/files/sufodejifubuzuxozeve.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/bulogoxebogusef.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b1fcc5796c0---63945316592.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16076a0087b6db---62190454418.pdfIn PDF document text
    • https://eledigitalpr.it/allegati/file/30757691424.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/6acabf0d982adf6ad4cdf74b72fb11d5/lesuxifefenirepepe.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/vven788hkka8avo7gjfcc6doke/mupumenulik.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/64955710196.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/93192137444.pdfIn PDF document text
    • https://leavingcare3plus.ch/userfiles/files/jilewudekavedisokir.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/i35oiu7d5v3biu6uv3ahliudnd/72819560365.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/jipaluxuzomovokefe.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb899e62a9---wexulis.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/fesukovexab.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/845323e4df76a61bf3ab20f066d1f1ec/kuvufegozebizezazaxoj.pdfIn PDF document text
    • http://centrumbiznesurawicz.pl/userfiles/file/zabikezemowisumofaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=minecraft+realms+free+trial+without+credit+cardPDF 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_off0001066d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E84 10920 bytes
SHA-256: 7504205cd2f3f3265e31913d51c68dfabc6ae997e3b37daab2b1b0bf599a4b26
font_02_sfnt_off000137ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AB 17340 bytes
SHA-256: e478f86947691e9a8a7fd790873c8e185718877778508f7965f908882a6ca71a

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