Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c85d299eef41df…

MALICIOUS

PDF

93.4 KB Created: 2021-07-08 11:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 000098f5146dfc1691f3c19430016a04 SHA-1: 33e8f50ef7445aa38f9ce31d26aca2a64de36e15 SHA-256: 07c85d299eef41df8b200aa6588d3cb2bf20334e8cfaa4ed70e1ba7766008712
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely serves as a phishing or trojan delivery mechanism. The document functions as a link farm, containing numerous URLs that point to external resources, including compromised CMS uploads. The primary attack pattern involves luring users to click these links, potentially leading to further exploitation or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://paroissedementon.fr/upload/files/40596887287.pdf
    • http://provia-events.de/pics/fotos/1/file/9507546524.pdf
    • http://asckhn.com/acskhn/userfiles/file/52532582449.pdf
    • http://retroldn.com/userfiles/file/lufixogo.pdf
    • http://fritz-fahrlaender.ch/download/77315342213.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/e30c33be035ac3367fb3ba2a2d942b02/pusevisapi.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/8c2ef440aace0373c859f3b65d0df6bf/33569216168.pdf
    • https://subarini.ro/mm/file/43081635796.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/6f99b4055bd7c9ab98d330ec15e8c4f2/pubuxajodenuj.pdf
    • http://uro-medical.pl/zdjecia/fotki/file/sigokokojowovepekexoxe.pdf
    • https://thegioidongphuc.net/ckfinder/userfiles/files/kevoweworo.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/b70978209e65a56ab04cf153d75652d1/20035937365.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b350580adad---56287780108.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/03f7b4d64ad61df6d98d0492dba640ef/24375643396.pdf
    • http://artin-intranet.com/ckupload/files/90477736487.pdf
    • https://amitadevnani.com/userfiles/file/57590522099.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1651c070d---lifagutoz.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/16783868126094c9dcb1ee3.pdf
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/6863c702e39ba2e307d23ffbc5dfad87/binenekarewegab.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbae27e8bb1---27750793418.pdf
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe508afe43---76506527873.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdee5c8c44---56903166185.pdf
    • https://strategieb2b.com/userfiles/file/20295822828.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b0672313f0f---julukulojewokobufinal.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=best+punctuation+checker
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c82.bin
c6d8b2150085d0ae9977bd56f6dd19ecf0b9a0d951b1d2fc816d4df82b13ab6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C82 16768 bytes
font_01_sfnt_off00013810.bin
d60c2af3944619e8684f3b323e1ad5207317c7dbd4a38c9086fa50b193f2d9de
pdf-font-stream PDF embedded font (sfnt) at offset 0x13810 10672 bytes
font_02_sfnt_off0001508a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1508A 16792 bytes