Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3eeae8fbe06989a…

MALICIOUS

PDF

69.6 KB Created: 2021-09-01 03:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cee419f7ddfd381be4bacee1112b4f20 SHA-1: 9d622f08ed80cfba54d597e614883cdbdcffdb49 SHA-256: c3eeae8fbe06989a49962fb91af6011e510998c75794c2d3927c8e446b0ad1ca
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains a single image, suggesting a screenshot designed to hide clickable links. Numerous URLs are embedded, many pointing to compromised CMS uploads or disposable hosting, indicating an attempt to redirect users to malicious content. No scripts were extracted, but the PDF structure and URL patterns strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://soudureornementalelauziere.com/upload/editor/file/35261339826.pdf In PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160ed810873c37---vekejof.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160917f968c2f8---japewa.pdfIn PDF document text
    • https://conrays.ru/f/data/37807315393.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/97604500307.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075c170eb5b9---tiwos.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/026fae0bcda05f98c0f700a18f774041/25028005772.pdfIn PDF document text
    • http://vdi.vn/userfiles/file/77916480830.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/luzupawebudexaposuv.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821429ed80f---bolidumudamakaxi.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160a3991547c96---10915571013.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/59469059831.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086dd4844a01---kamudevaxakenonuz.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/32e6e68586b491d83c1b0fbd86b7a3bc/jinoxudetagi.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/551b0ae567b1ab6db59b86725e99e71e/rodezanubojukula.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/54035605104.pdfIn PDF document text
    • https://oilbasaro.com/web/images/ckfinder/files/20210703125846.pdfIn PDF document text
    • http://koslita.eu/ckfinder/userfiles/files/wikuninimutogoxi.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/vrkdk9crfd7lns0rhq1okh3sfr/zegetadubedofujazenibax.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160761b8aca1ab---55726402009.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3a2e2c471---pelemelonajusubamowod.pdfIn PDF document text
    • http://beiks.info/public/file/90698249486.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/4a3030bd58d44500905c05656b99fc0e/xawuvonesumop.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/viluvisupawugito.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609164fd6e85b---69895692087.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=missing+maxillary+lateral+incisorsPDF 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_off0000b581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB581 13856 bytes
SHA-256: 49c71c72a1fb0a181f8ae37e0a3be76e1fb9c89664aa81c2e6ee298402d78feb
font_01_sfnt_off0000d82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF041 10780 bytes
SHA-256: 3fd7d9e074edf9b091d97f223f08d2a48fae9734c8b87566c5687bd523402c74