Malicious PDF — malware analysis report

Static analysis result for SHA-256 b006fcd534ea1627…

MALICIOUS

PDF

92.9 KB Created: 2021-06-29 08:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d0031f0e4ad43c42f34ba545ad7a6a81 SHA-1: 46f79b9b0baa0e6bf423261472104086db21b7bd SHA-256: b006fcd534ea1627937801138072e3162ceb2dcb5326f43dc6a4ce622663941a
116 Risk Score

Malware Insights

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

This PDF file contains a link farm pointing to multiple compromised WordPress sites, which in turn host further PDF files. The ML classifier strongly indicates maliciousness. The presence of PRC/3D content and the structure of the links suggest an attempt to obscure the final malicious destination, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 6

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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 https://ketchas.ru/uplcv?utm_term=arabic+joining+letters+practice PDF link annotation
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/b002514f5ecba2eb4e264839eddbc66a/togofiwoxatanoneraso.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/ntblano8uveskocqgif0ih61ql/piwakagukebirenidu.pdfIn PDF document text
    • http://aligokdemir.com/resimler/files/78320801632.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16083ed890349a---63383832138.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f409f7270b---97433840683.pdfIn PDF document text
    • http://southport1969.com/clients/861680/File/kivepapugumafuzunopogekek.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/8780463090.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b475c85f10b---31727511113.pdfIn PDF document text
    • http://tktravel.shop/FileData/ckfinder/files/20210624_329C81DDD6CBF088.pdfIn PDF document text
    • https://dudikom.pl/userfiles/file/37914187790.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e7a8a7369---48703162713.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b20f0ea45eb---gejixiwagiwogivuvajapa.pdfIn PDF document text
    • https://pacpartner.net/images_client//imagesfile/fegufa.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c72fd75c10b---50230861058.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16084c2973b0c5---venipejozositapoxup.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/61a362dc412f869ee154afeff816590e/vimewufuv.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160854bbb1d99f---56109623024.pdfIn PDF document text
    • http://wernitznigg.at/files/zijik.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093deaa28186---wakiwuwexopedidubav.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/mamibozuxiv.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/q55tiaj5s0v7iu0s8h7s9s0h8h/sixipe.pdfIn PDF document text
    • http://www.polni.si/Images/files/nanavi.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000e7ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE7BA 19224 bytes
SHA-256: a94f0045dca055803544ce061c0b5191982a842757161714c243b4c876de82f1
font_01_sfnt_off000105b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC9 10800 bytes
SHA-256: 625fea82537681c089a6723c364ad8a464872bf5d17bc2b4057a86ca9f7b200e
font_03_sfnt_off00013695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13695 17888 bytes
SHA-256: 79c3e72d9fd8808984f6b1812d8633f26bc97e69e150ea9bb15d41768fc41cd1

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