Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e5edd7353280f58…

MALICIOUS

PDF

79.5 KB Created: 2021-07-29 21:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6a4b6c6e4fe6e4cfab9ff37ab5092aa5 SHA-1: 497abf539e5f42ca8e284e76827765a11032d31f SHA-256: 3e5edd7353280f581fa60b426a47a56d39cae925470295481ec7730d68f688fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and links to compromised WordPress upload storage, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 https://garglob.ru/uplcv?utm_term=pokemon+heart+gold+rom+hack+mega+evolution
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/97d1ed4817f3f6365d2ad0187960d994/52159496406.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160731a23c51b7---61063200669.pdf
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/wirisukuxadu.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/e74dce3179ea2329d7429a069c8294f9/37050738345.pdf
    • http://king-pro.com/userfiles/files/fotesedamumowipagag.pdf
    • http://influences-vegetales.eu/assets/Image//files/93541620869.pdf
    • https://chung-pei.com/userfiles/file/balagowelisisedunopave.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/e90db7194233ae3f0a98c7522cad1b48/werakujifeki.pdf
    • http://architettodrabeni.it/userfiles/files/xiwepefisozonefuzav.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076322431f57---71808885865.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160d2c782d4d4f---68201388895.pdf
    • http://americasbestwingsbeltsville.com/uploads/files/felobafureronaropo.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/vosobuvejox.pdf
    • http://vce34.ru/attachments/file/61820933704.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607416584f97f---47722756888.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/28e2a56f53518e9afce7f5b01db00191/87062906921.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/26b57e3202e1784c60367eaec03c4e17/mowubugejanibewexudi.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/35235163079.pdf
    • https://aitalk.vn/upload/files/widokametelerazu.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b23f7d06d5a---62001998205.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/s0trlkhebcvufmb8pb4853uns5/8457018078.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/dcc6e51d5d1270a01bf354cd89fe78bb/35131632152.pdf
    • http://livingkaneohe.com/userimages/medixokenozilel.pdf
    • https://ajansnigde.com/resimler/files/67845381010.pdf
    • 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_off0000d1f6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F6 16792 bytes
font_01_sfnt_off0000ea0d.bin
5473c48789e683f5b1367104de5d7c5cbd8bd14ea427d5e4ec33a7ac9cb217bf
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0D 10908 bytes
font_02_sfnt_off000102e5.bin
0065dafb6fd9760ba7a381b212a5d99b8df4ea7e973c9febaaa79ff6f86c63ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x102E5 16016 bytes