Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec48e655e114aa73…

MALICIOUS

PDF

90.5 KB Created: 2021-07-06 14:29:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3289c6e1e859545f82cf769fd984cced SHA-1: 5eefa3cec45a0acfcdec27e1ccb7383415630f00 SHA-256: ec48e655e114aa73fe39e482df0e140db647269722b948518e3cafa228045ea5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://catamma.ru/uplcv?utm_term=non+commissioned+officer+navy PDF link annotation
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/9aee2e191892f49b98997888e67d6ce5/sujixetigivuk.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/0b572cd7cd38ffaf6b3daf8965646099/37918836368.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/f4tn20jmh86nojuviedop0s75u/80146544557.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/4d48c985779e8f3cdc913df4f1230c11/65845005348.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/19781524713.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/33f7856a59add7b84f22e5a20f6c5fa4/zerana.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/90412761040.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ce556d7df---guwajapumanovi.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741c5324b82---wedawedakuworigamoxu.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084408f1a758---nixelusawedobo.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/89162618599.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/gofaletiv.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/c5e91edf9f4f93a3b1658d1186326726/92571384700.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afac4727c6d---dozabajewijamugivedazova.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b7c69c9f6---budunevude.pdfIn PDF document text
    • https://bhandarisurgical.com/ckfinder/userfiles/files/87853849173.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/46303096879.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/6dfc78c03de0cef8fdbb64b13f14fd0b/8311188469.pdfIn PDF document text
    • http://inglewoodreunion.com/clients/68690/File/xufapimalosawavebolon.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/65436348094.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/81432239418.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a3ccd5102---timisuvotitosutale.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/4948ef203d8d5b5bb5f695f3805f73c7/keseludaxuzalokew.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/9eluj7lg6upon44914hd928fp4/41003425986.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_off0000fe8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8E 10652 bytes
SHA-256: 73348eff3cb303a79999ebb7ad788fb0d7b54d9cb834cc675bd3a3afe341aa76
font_01_sfnt_off000116f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F0 17572 bytes
SHA-256: e2cdbd98b26c4dfcd621f83d09d564556df2a05cae0b8883bd7c47eca7182801
font_02_sfnt_off000144bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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