Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5252d7c23842c84…

MALICIOUS

PDF

94.8 KB Created: 2021-08-13 19:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f1230bf791d062fd3a3af4b63bbeae33 SHA-1: 65912c78fabb99f7cac1db2c7326ea2d6b2fc306 SHA-256: e5252d7c23842c84db2dda412891c143d951ef0598673d062c2489a750b7ed29
204 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites, suggesting it's designed to host malicious content or redirect users to phishing pages. The presence of a Facebook impersonation lure further supports the credential phishing intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://archism.ru/uplcv?utm_term=drivers+ed+test+answers+texas.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=drivers+ed+test+answers+texas PDF link annotation
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/0788a905cb96b665670f18f9780a8f01/34693392396.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/5rppn9rvgso2dlggu8skdtvnt7/86134944101.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/2959529296.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/dedobufaditadirememafi.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/majibilenabonotajerifop.pdfIn PDF document text
    • http://vizcsap.hu/files/file/numidolevutoja.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/dogomogibarutoburubuwa.pdfIn PDF document text
    • http://bendhigh1970.com/clients/1/10/106e6567aa8bd3cecf4080670b11bd10/File/63148016111.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/qa8lu3ru6248hlj9udhcjjdm9f/63654113731.pdfIn PDF document text
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/71226177995.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/c42655fa6ee8370488c219ece33e452e/7769366114.pdfIn PDF document text
    • https://ooobelkom.ru/ckfinder/userfiles/files/wabenevib.pdfIn PDF document text
    • https://faceless.me/userfiles/files/10438703577.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/06ba0023949cc22ed49c49b0fb66a1ac/81373287974.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/vewudowezaf.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7b80b1193---jeletosisoxe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af727467f6e---40614128645.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c3cb6a47c---wujowijozed.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/jugumapezix.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16107f7185c1fa---tefafodemesixi.pdfIn PDF document text
    • http://ahchala.com/img/file/94794294604.pdfIn PDF document text
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/13672595032.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/8c19472393dcf5d8913293a476259ea7/lujagozir.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000126bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BF 10332 bytes
SHA-256: 745a3cd197f60ba7797d2a4e2bba43290d59739c7631a803a1d170d376b96ea7
font_02_sfnt_off00013e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E44 17520 bytes
SHA-256: 5277ec4cfceaad10162081cfb9e23ddd8f31a1ccbb5804dd95106cc02f094803

Open this report in the interactive analyzer, or submit your own file for analysis.