Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c396c71624bc5f7…

MALICIOUS

PDF

104.2 KB Created: 2021-07-08 08:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f3c87892cf088561b2d8869bece365a0 SHA-1: 183757fdac748a648d3c254ecc0ee2b1ade32e41 SHA-256: 3c396c71624bc5f7913a92bec96bdef4c3a2d32052cb8d1f60f14651294d413d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous links, many hosted on compromised WordPress sites, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads, aiming to deceive users into visiting untrusted domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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://irlanc.ru/uplcv?utm_term=pauly+shore+leaning+tower+of+cheeza PDF link annotation
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d283971ab8---zanoxixavadukapisekibad.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/94317600590.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/uriwaxegetapawaxaf.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/25c68e2f67edd24e71bfa10b838e720c/30256003484.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc85ae45df---wugip.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ce26c1687---62724331071.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/bd0514271eee118b91762875b37522ed/xofonutijepenefoxa.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/3ujk6u4mad6ebh9c97mpge572g/jevukunibebadavara.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/3f16cef2df3a2ee4bb6e968a2c97193b/98445978794.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c34e77f2a2---tiradipoxulaf.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/parezemijenagokadewuzid.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b61de126e0d---90992561200.pdfIn PDF document text
    • https://turismoporsantander.com/aym_image/files/kawatezerapig.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5fffd7ecf5---zegodaruvenakine.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1f2f7b0ec---godeje.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/49affafd19daeff23508ddcf26e52c29/73869788443.pdfIn PDF document text
    • http://southport1969.com/clients/861680/File/fegolel.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/p7ljt7fhqbpcsp385ofvht3sih/67659408175.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/lhgha68o3vspu9c63bo92s7ib7/vujojuma.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a56300755de---49989881197.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beee364eb41---52505636603.pdfIn PDF document text
    • http://changdahk.com/upload/suzolezezegevuzebi.pdfIn PDF document text
    • http://sooclose.eu/upload/File/47534565035.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802dfc3bfe1---zepaw.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/66115966352.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12235 2300 bytes
SHA-256: d1be167df880c39ff5e6d8ec876ae89e5270e203e371f33977b60713eedfdbdf
font_01_sfnt_off00012c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C60 10976 bytes
SHA-256: 492fd848155d12c5508b887dbfd05ad1af8c03dcabb9e4c9495514108e37611f
font_02_sfnt_off000145fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145FB 20652 bytes
SHA-256: 3f3f50c001c7cf8e4760f1cf401512c0b4810d3c193320aa6beec1baee3abf5a
font_03_sfnt_off00017a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1