Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2718b8613c0557f…

MALICIOUS

PDF

83.3 KB Created: 2021-09-01 14:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 97a5fc125ea2fa4e593c6c86bf7f1c09 SHA-1: b9013f0574e901b54a2b632af9ba3369838cc873 SHA-256: f2718b8613c0557fd2d2419260be0487a9274283e2456cbae9993255918cb8d1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristics indicate a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://app8itebarandgrill.com/admin/images/file/loxik.pdf In PDF document text
    • https://dadrarad.ro/userfiles/file/vijojewowojosikeda.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc3438ad7c---nosadomutep.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611dfdc62ab99---33053296449.pdfIn PDF document text
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/xesuboratoguregob.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/49098773267.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/megugakeloxaxuwenoxovow.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1610d857182d3c---15333935087.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/jamosituvewu.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a459dff1825---gixigesemo.pdfIn PDF document text
    • https://brianspradlin.com/userfiles/file/xevewozolafeleja.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/50036503796.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/biwifabixu.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a330bf59f31---tajezudepidetereraname.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/85173919386.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609656784e3cb---75918661478.pdfIn PDF document text
    • https://vientangluc.com/upload/files/8655420589.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/kovikabow.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3796496c1---witaritadupuju.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/jijuwuzezo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=chips+packet+printingPDF 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_off0000e03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF853 10608 bytes
SHA-256: 788946492a9ec38847b29133a584177feebf7aa176393f0095e48eb8ea6e1036
font_02_sfnt_off00011096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11096 18068 bytes
SHA-256: c9d3bd009d63cef55dc3a24406430c495705ce30f20d9b6e54475af125588914

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