Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed5931bd1b2bbc8…

MALICIOUS

PDF

74.4 KB Created: 2021-09-03 08:18:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6fbe2f4343045dabecbeb4a6f1af8e50 SHA-1: f3507aaabea25d71f63407400e92956bb480b66f SHA-256: eed5931bd1b2bbc855d9ddebb280640b57f0f82f29d3cf4dfa54ec35e7266baf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate that the document's primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://chcial.ru/uplcv?utm_term=speechless+piano+sheet+music+pdf PDF link annotation
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609479ffac021---pikosomitibutenal.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/gipufujumujukediranok.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/15749089739.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec2e91b52d---63746179005.pdfIn PDF document text
    • http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/sesidi.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/goqhomag4a54bcuvqn7csf2lc8/92009344344.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/d6925db1413060ca6dbdb006f1f3dabc/forepozujakukurokonumitu.pdfIn PDF document text
    • http://ashioke.com/images/library/File/60299422341.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9d8dba8bc---39510827291.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/7cd95aba474097fafcf43542355906b2/zaliturox.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/xotiluril.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072195b9a124---salaw.pdfIn PDF document text
    • http://ducthanggroup.com/webroot/img/files/51065576147.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608319f198809---24817484937.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/lefekifelopenamuje.pdfIn PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/mebezurezos.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/22311327009.pdfIn PDF document text
    • http://dashoernerboot.de/userfiles/batukibalikufepozi.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b52e11cf7d---48808887000.pdfIn PDF document text
    • http://plastikacz.cz/soubory/files/ruvopeberavujibewa.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/dorojumojisatalisulefo.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cbc72d12a65---liluvexudinabutadezuwi.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/48591756326.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16127ae0ea9672---bokiparakatevovagi.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_off0000bef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF2 10960 bytes
SHA-256: fbe56bac8451f87fd51bdb5370cbe9828bb6ef4c9b0299cac57db4b9106dfec4
font_01_sfnt_off0000d825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD825 17312 bytes
SHA-256: 77300c655b5826acf2f829177cc70d69713afcd4616fc5589510bd86d737fe4e
font_02_sfnt_off00010419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10419 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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