Malicious PDF — malware analysis report

Static analysis result for SHA-256 7092cfc0bd0d5490…

MALICIOUS

PDF

83.1 KB Created: 2021-06-12 22:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7a28f67058a17181cf3fff2d5aa0d948 SHA-1: 265e3b03a985160acaf55806c9e552fd1c1b3093 SHA-256: 7092cfc0bd0d549046b93b4dae632ca78a71b28d68052127bad112e8e1ee5ac8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content. The presence of a 'download button' lure and ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing and malware distribution intent. No scripts were extracted, but the overall structure and URL patterns indicate a phishing campaign designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crewmak.ru/uplcv?utm_term=super+20+sample+paper+class+10+pdf+science PDF link annotation
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/e15a5f58e6ab3acd8b8207613fdae5f9/pavolowegowozatatedasof.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/nivewinaba.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/5fbefc4452442b6727bd7e325d6970f3/64050421699.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/70908715606.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607775daa7569---bupusuwo.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bca0b6c6e26---mejajibenufelafutujaveg.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/fab78f42b2cdde49f5f50a59ea9e008e/61323421902.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/7464ae62bfc8d7a0c57195d837cfc277/81735669601.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/9b7d84c4a6b090ffcaa45215ed1ea1c9/vaxixifomapojabuwubitixe.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bacd9abbccc---netesimulemefuni.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/r7n30def0o23tpnd4lsjlh0osq/wopafalakarivudunakajaset.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/9b508f0b3e81bd64a28f9a3a2e365e9c/podubam.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/fb25e7b4b673caf88cae00f9508af607/boxobigavoxetaxifew.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/23baf2bb984307a1d209d5e038fb156e/72283923547.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ae2251789---rabagete.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/effe5455dbddd0ce02c3ec8a5e4ec066/sokipasuga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0000eee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE7 5732 bytes
SHA-256: ab6bdd861f957cd366c645210c20cc5c4a102b92f05d178727f5aceabd03f983
font_01_sfnt_off00010257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10257 10524 bytes
SHA-256: c2f5a224455202c071cba43a79270155e84b744a271208ca4bc26bc5990eb7f7
font_02_sfnt_off0001266c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266C 17028 bytes
SHA-256: 7e31e2b950bfe0d514fa5a2db46974e06704ccf367169fe3ad2b1fd89a9b5371

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