Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf261580507e9508…

MALICIOUS

PDF

93.1 KB Created: 2021-07-01 22:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dc2b6001437a650ec913f46baf955a2c SHA-1: b3a5dce74f17f77466b1bca436ea77f3fe10709a SHA-256: cf261580507e950867e8a7a0f077ef0278421b7553ffa5e08eeb7aea628a7366
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ce4d8d059---85344203904.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/76284545375.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c47f174c283---17752967528.pdf
    • http://cuatudongsaigon.vn/uploads/files/lenasodirokazodo.pdf
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/iooo31u6g4cgfdaoaitobcuv5o/vevida.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/7d9c1082545e49a40e46699e8b50f690/48069763791.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/tc4l09hp5ts2dp67oh4guhlb64/94903242518.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd59d382d9c---gatukawasitifewexilari.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/226fc6d9dce797a276f993032fd6c440/91611543983.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1609472aecf714---94685858736.pdf
    • https://theatresaucinema.fr/uploads/file/20769523494.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d583dc4048a---84865360685.pdf
    • http://esoftland.com/userfiles/file/fuvagijivegup.pdf
    • http://waukeganeast1980.com/clients/877304/File/lesunixezitojokufos.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160774eb4f0aca---35260494184.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4a8ac737c---jemitelijetedinoluzuxe.pdf
    • http://studiotecnicobonoli.com/userfiles/files/fajewixeruvorudasagovibib.pdf
    • http://secretlove.ch/ckfinder/userfiles/files/gelopazovow.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/ff2329737e0b7132d591dde188dec77b/busuwikitar.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16087df8365d0d---jemezenusu.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/794a6200553f2d2546bd1f00c4aa03da/fakadulovugivigom.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/nh8k8ngbuvscs6nj5ugcomn6di/vunalezix.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/c2175j1agb1k4qvr1qifi9e77o/dumixatorutoxawipuzugivuz.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc925e6710---weruze.pdf
    • http://ggmtc.net/userfiles/files/vukoxavidejudetura.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/53545ed232a1ce5d56fea13d7fe5fb5e/58767413484.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=agents+of+shield+a+hen+in+the+wolf+house
    • 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_off0001043e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1043E 16792 bytes
font_01_sfnt_off00011c55.bin
c40671ab8759296bf617892308b6e1a1e176aa3a1af64a27ebff6db13662156d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C55 10700 bytes
font_02_sfnt_off000134b2.bin
1af3c63b327f2363a15ff0bcc2061c02ead3ebd116553d6efde98d013f4400f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134B2 19492 bytes

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