Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ec32dead01a768…

MALICIOUS

PDF

89.6 KB Created: 2021-07-29 18:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1818fdf11fb8e78d7aba675c81a8f085 SHA-1: 295a2c6450787318f64b72f7dc1def66c7727b81 SHA-256: 12ec32dead01a7687b88aa68bf78e092b6cc96fe8ddcd3f9733e4552a72ab22a
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or SEO manipulation scheme. No scripts were extracted, but the structure and URL patterns are consistent with malware distribution.

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://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/ouof7m8vqmj1rhvh8khs7csgd3/bomad.pdf In PDF document text
    • http://geologocarmignani.com/userfiles/files/pimuwiropexosaz.pdfIn PDF document text
    • https://cribpointonline.org/cribpointonline/userimages/file/repogoxovizef.pdfIn PDF document text
    • http://demenagements-remond.fr/userfiles/file/20210726044320.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/jjngkdck3cijesssmur3pt6485/44803786020.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fc411a2b6---93827963581.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a95db877fa1---fewufojokusoxipitu.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/16948572337.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021062506261573499.pdfIn PDF document text
    • http://ambulatorioveterinariomariani.it/userfiles/files/11120147846.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/39019992359.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/66839013816.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/45s4igm7kjjc7km92n0givubl2/zebinanigodelojabalob.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16072d9a5e28d5---raraberezofexadibapabab.pdfIn PDF document text
    • https://flomogroup.com/upload/files/sulabufalewofakemozo.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/22af9ab54d069a6516af361cf4b24cb6/jexekiwuvuzubekatugogef.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/67478045619.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/23471869533.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16090e263c9808---89863458556.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a159210b3---180340178.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076e4663506d---4189653510.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/34750809293.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9519444ce---27716691447.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/626a5e1036a320f3239b2ddbe05add5f/19476770927.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+make+metal+texture+in+blenderPDF 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_off0000f926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF926 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001113d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113D 10752 bytes
SHA-256: 08f917ade3421d39e2fde61f59d5e26c81e6d5d0a712c952542b06286459f966
font_02_sfnt_off000129e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E6 17320 bytes
SHA-256: 8e7e7fa57c9a8035889abc5b44bd5e45fe7af90e421b87acb24608d89c937d70

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