Malicious PDF — malware analysis report

Static analysis result for SHA-256 094c143034c86c82…

MALICIOUS

PDF

96.4 KB Created: 2021-06-28 18:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e826dd871e49489ab2257c82a89896b7 SHA-1: 98231e090c8e576c7c6d08b71e98cfb3bc4d50d0 SHA-256: 094c143034c86c820dde40dc77710ff18ebb92ca98d31cadb57213d794d244f7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted, but the structure and URLs are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://geodez.com/pliki/file/limavosenevejus.pdf In PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/kgpav6g55pncf41c0cc94aacs2/rafejuwiwusenevutufape.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/e127d0207a454f26d78fc8d1bb2abc0a/bejizokixixurofixeg.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/85483e1fef653b5cc7a2b9104689980f/bomesolenosuvapadoxuxotez.pdfIn PDF document text
    • http://freetourscadiz.com//ckfinder/userfiles/files/lebalafuja.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160733a16985c2---dumivif.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4cc501900---wesisalivepotanovimuzej.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8a5752c68---3915102707.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/ca791e332d7add60326a0565a4188460/nodekorixokapafiwumafa.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/nowalafizusiwuwuxokupare.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609915e52f9d9---48203192701.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/ft8sjae8sod6k3nhv7lsiustit/64217589891.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/3763f3039b6436dfaf7a984060e75b60/86966952775.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a576eb77a15---34692776020.pdfPDF link annotation
    • https://espiber.cl/images/uploadedimages/file/43006834313.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608805095a58c---53328905220.pdfIn PDF document text
    • http://fotofidelity.cz/userfiles/file/86493702718.pdfIn PDF document text
    • https://bdsvieclam.com/upload/files/tiluvetoxunitufavirunonu.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/giwiwezafixav.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/43c3d396f17d11377827b293e35885e2/89803782120.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/543ccef09fe23ee1c70261f22832171e/26514795020.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/17715064862.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079f340795a4---togozukepuxafinigobexis.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/7slole95ohhphmbjdmfrvnrt7m/5481316523.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=derivation+of+poiseuille%27s+equationPDF 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_off00011704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11704 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F16 16844 bytes
SHA-256: 885e323e4b9d43d87e025ad1050b9d1d612dbe299996ec00ae6a77894f2e7ae5
font_02_sfnt_off00015b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B3E 10700 bytes
SHA-256: 745f7a6dfcdb667ae7741dce324c3bea3001862f36f20217e7f14ebc855d7a80

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