Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2661ec4c865e88…

MALICIOUS

PDF

75.2 KB Created: 2021-09-02 06:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d6019db7ec7e39fd5baae28f76666ece SHA-1: 88878c7e688a6e7dbd3bd3f54306b6a43c6d71e8 SHA-256: 0c2661ec4c865e88a05f81f17483b3b24d2716830d98efc5617a74028e527ac8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 7

  • 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.
  • 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://daaeportrett.no/upload/file/10140127456.pdf In PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/5927spi5cn6atuftfe88jdp93a/30608303118.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/cf4ce026c35875ca584ed50c6d95d85d/20442777877.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/bigegago.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/8635ee412cf388af99a665db2b2f52eb/nemafew.pdfIn PDF document text
    • http://gintaras.cz/userfiles/file/luzorizavuxoko.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/61d9627374505291c3e8943d113dd823/96491190276.pdfIn PDF document text
    • https://pmfegypt.com/userfiles/files/letal.pdfIn PDF document text
    • http://shrlie.com/upload_fck/file/2021-8-30/20210830022056686853.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/97290623565.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/46158273950.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///doniwejigedewevoworofewe.pdfIn PDF document text
    • https://www.colegiodomus.com.br/js/ckfinder/userfiles/files/9316946904.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/gexukuwefugosuseguf.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160769b4c23c04---zofem.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/ca75ab2e14ffd7a9a74e8d0d7346ebb6/37707109919.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/da83d640c83d8dd7d90d01b0372a2416/52775759453.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/9ikb28ev9j9r3acka7pe1i18nl/10499076088.pdfIn PDF document text
    • http://jar-ted.pl/file/fibotajepobexusiw.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c31ff0f84---43923603538.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/6f35ebb2dc36b6506c705fa6c41caeed/27396684779.pdfIn PDF document text
    • http://furmanreunion2021.com/clients/3/37/3732e4fa3878e851f9d164dff32a9cbb/File/fujavujiwamemekaseri.pdfIn PDF document text
    • http://sintjorisparochie.nl/userfiles/file/lugogofufomoxiduzeju.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/jizodujunewimufutepatado.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6764922ab---12355483394.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607885d709bc3---bumopibuvuniv.pdfIn PDF document text
    • http://malovanesklomh.cz/images/file/59026136837.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=chicken+wings+nutrition+factsPDF 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_off0000c3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB7 15808 bytes
SHA-256: 4ce66483250abfcf9b331e495dbb243d755ddcd9eb567b75cc56d472a76de079
font_02_sfnt_off00010483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10483 10880 bytes
SHA-256: d24cf2d30ac327d3157ac2abbbbbf5dba51b365e0a158e4c59edaba979c23a48