Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c32996f45e3a449…

MALICIOUS

PDF

79.3 KB Created: 2021-08-18 04:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 02827e29d7778431d0d49778ac9dfaf1 SHA-1: cc4fda6b98558c3e1b7e82dea02af9c346c745d1 SHA-256: 5c32996f45e3a449eb283cd6083f93d124c6747a553348ad2fbd7139e9c2c53b
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 as malicious, including a ClamAV detection for Pdf.Phishing.Trojan. The file contains numerous external URIs and links to compromised WordPress upload storage, suggesting it functions as a link farm. These links likely lead to phishing sites or further malware downloads, aiming to exploit users who click on them.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://smidgel.ru/uplcv?utm_term=los+ojos+de+mi+princesa+2+libro+completo+pdf PDF link annotation
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9805578c0---26464407643.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/68102309550.pdfIn PDF document text
    • http://tillmanfamilyreunion.com/clients/b/b7/b7385abc5988d1ee605fea7695e3d00e/File/1852648775.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/64322578868.pdfIn PDF document text
    • https://gencerenerji.com/resimler/files/livinelatadobuwa.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cce995e4e02---25667904471.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/darofim.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/bdb2b2f1c9cccb6a3b0d3b026ffb908f/negiwovulajozaderakivi.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/6163723140.pdfIn PDF document text
    • http://mtreurope.com/ckfinder/userfiles/files/94052999701.pdfIn PDF document text
    • http://delve-cr.com/uploads/19977953416.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/dcbd5d6e659541fa253925124a8ff5f6/16117281147.pdfIn PDF document text
    • https://buka.ru/sadm_files/zazunozemi.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073745ed4699---xazibavedujitaronajir.pdfIn PDF document text
    • http://nbpcpentecostalchurch.com/clients/65183/File/43669581532.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/5744a4e4d39d88e426f336c734194e32/zumuk.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f95238694b---88945676055.pdfIn PDF document text
    • http://imi.vc/upload/files/gilemadejo.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/popugilubozinitulezonuvo.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/399d84463fd6bab73535fb14f857b0c1/xejakosijinoninezigedifop.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/97850057666.pdfIn PDF document text
    • https://atphp.ch/userfiles/file/22221043473.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16089136dee6a6---22985411622.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/16228251021227494667.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cb1e1334e---zofanasawevuwezatumiwama.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_off0000cf5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5A 17564 bytes
SHA-256: ff9486b73d57f888663354d048b3daa2aeb5e0368c78a2f9e7c5a1b1dbe3a1c8
font_01_sfnt_off0000fbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C1 11128 bytes
SHA-256: c395c999a6ff241a719fccfd24c879d9cb3ab265298d5ddb2ba12b2e3c81a75c

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