Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fab30491ccef107…

MALICIOUS

PDF

83.4 KB Created: 2021-09-08 08:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4bd52b4692abf5bd7d7e90b393b68017 SHA-1: 667a21209b357c9253c2e2bc17a5f166e7ca3e8e SHA-256: 5fab30491ccef10753a2546127b1308f809c9b4a110fe033cf2c9dfaa812d281
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple links on potentially compromised sites suggests an attempt to obscure the true destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://ccswcd.com/userfiles/file/tuwatexilukizop.pdf In PDF document text
    • https://fcr-fomentoconsumoerenda.com/uploads/files/buxijexobesimategoburir.pdfIn PDF document text
    • http://unitez.net/images/newtech/files/zuzevipara.pdfIn PDF document text
    • http://nlureunion.com/clients/33063/File/2797440700.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/51699555662.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/86026007542.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/a055cd60b082e1971ed79a8e215a2d6c/lukegopupiredosafabakesa.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/donewarowuzavowiwul.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/1230d5e0f014e200dd31e2025f170314/gikaviguv.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/6bfde336e2448db6ac0b0d5fd864a60d/riramirusiripubawadedo.pdfIn PDF document text
    • https://rcot.org/userfiles/file/47168004030.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16092802e86c0e---46116125871.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/12b6982b6550af2fec0f7db4a7bfb8bd/mebuviborazig.pdfIn PDF document text
    • https://aviseco.ro/userfiles/file/visumolunupuxumovatoti.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/33556208378.pdfIn PDF document text
    • http://perfekt-dom.pl/designhome/admin/userfiles/file/gaxajifagulap.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c91c7c8e13---rerikerewalinuz.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/631268756.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/setozanu.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/e7f611f9fd29c306459df0155eb9bb40/piremazasifoxixur.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/e98fe80b33caa72b9d585d7620a6df01/kevoraguxev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=pdf+management+accountingPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a062726abaf---nosonelowotadevalasu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80C 18364 bytes
SHA-256: 8f79e0ac92e3ed08a26de4fc171965e1d2aa1f11a330a038161a99166581f751
font_02_sfnt_off000127ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127EA 10604 bytes
SHA-256: 2abf4a60be81546d25516a101005d90a349db1c8e888442fbb0d6416d5c502c9

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