Malicious PDF — malware analysis report

Static analysis result for SHA-256 af7248ff4e7b2f9d…

MALICIOUS

PDF

91.2 KB Created: 2021-08-05 18:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 24ec3995dff29048173eb3dfb24b5567 SHA-1: f6f7d2a966efd3edb95e3377d815596fe9dfb3df SHA-256: af7248ff4e7b2f9de41a124826bf8481448480b70d06bef675ae2bc3a426b066
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, but the presence of these links strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/161006689405de---29718893646.pdf In PDF document text
    • http://weifong.tw/fckimages/file/runawofusopemifuwerefa.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2dd47d5125---tifepedevifomejeje.pdfIn PDF document text
    • http://gardnersunited.com/clients/e/eb/eb3320446930dd457027df34457c622b/File/24157346321.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828f971fe3b---rutizoxom.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798745dd3ea---56383724357.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/97908613660.pdfIn PDF document text
    • https://sanxuattrucauthangkinh.com/Images_upload/files/zosizebosivebukowepu.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/dc67d3ca0093d26d2aee8f51baa6d9d2/59666481458.pdfIn PDF document text
    • http://davis-wilford.com/clients/5/5d/5d1655677b271656441dfc21bb295863/File/gejewozavejivulawa.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed5a5d82a9---61949968636.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/64035836912.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160856ca259099---15769952145.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/bapowetonobikaf.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/fvg6k34uhqu215uebmk20c7ga2/pilazozanekunapulisana.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608706dae2572---wusopaxipogetoxipi.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/8b8f48047d511e05cecbff2699f828be/12602750682.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/fenolijekowekop.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d280c2a57b1---mesonunaxaf.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/e22b5a996931eaf818d4616524d1ba65/gupezumiju.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/nimakukilosagomixuzigudi.pdfIn PDF document text
    • http://whalesart.com/uploadfile/file///2021053010474914.pdfIn PDF document text
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/libemamivavedu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=house+of+night+novellas+in+orderPDF 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_off00010013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10013 10792 bytes
SHA-256: 30353a9d48ffe76fd49d5af90b498a421e775c6ed404034797a299636a57769e
font_01_sfnt_off000118ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AB 17532 bytes
SHA-256: b2bc4c65345edf2f20da5fba167842daad3683b6139a857a646190572bc35bda
font_02_sfnt_off000146e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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