Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6236dad8997005…

MALICIOUS

PDF

91.0 KB Created: 2021-08-16 07:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bc2f83ad003abaf6f2d27dbd70e57a6e SHA-1: 59e803499ca3ed41389f0da355cf60e0eac3f81d SHA-256: ce6236dad8997005e8062bf9fb35730b1dc71a05da9a238e1e8c4738eb725b61
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised CMS upload directories, indicating an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://phunggia.biz/userfiles/file/19435583884.pdf In PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078d15c61808---jajejenajuvajop.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b14baf07876---wumup.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16073cbb5e9ed2---boselobuzuroda.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/17047960160.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/75532765401.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/vilukuxalagopepuzuwusuk.pdfIn PDF document text
    • http://deltools.com/userfiles/file/pezugadato.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/jumuved.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/saveluvulolefi.pdfIn PDF document text
    • http://gaskinfamilyreunion.com/clients/b/b7/b798c9f9e2af69c3a5b950a06e4ade8e/File/kukeges.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/lhdrg31kbap94etg5hk6s83jl5/pojet.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/8bsm9grj3befv97iqtbt4447n5/jawipuxuwu.pdfIn PDF document text
    • http://arcstema.com/userfiles/files/45258453245.pdfIn PDF document text
    • http://somersetcountybar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86117542470.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/rajimizuxezanege.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bb6594d01---60131183178.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/kavoroxovoxosup.pdfIn PDF document text
    • http://landonintergroup.com/ckfinder/userfiles/files/44711351511.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607de42f12912---pixum.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608c772d10fd3---wufuketoteva.pdfIn PDF document text
    • http://helloshoppingnepal.com/userfiles/file/todupizuwenos.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/3772115725.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=present+perfect+simple+present+perfect+continuous+%C4%87wiczeniaPDF 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_off0000fb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6E 17832 bytes
SHA-256: a4a970627c43c20264843b9cda263efd46de1db3b9fb24b47b6ac9acd9bacb65
font_01_sfnt_off000129fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14215 11028 bytes
SHA-256: ee84b2ea3c6d76ed27f6c2045bb484d96569a601da75ef97994889bff5122cf5

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