Malicious PDF — malware analysis report

Static analysis result for SHA-256 64419714b359d0a8…

MALICIOUS

PDF

79.2 KB Created: 2021-09-05 05:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 186edcc5a00c5c3be12728fbbeedcaaf SHA-1: 99f8dd07c5882049c03ad621fe8f3ee1c57f7430 SHA-256: 64419714b359d0a8c0a5cc05c234224fcb2837a9a3a53ec4d8e66957d349cd5a
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple external websites hosted on potentially compromised or disposable domains. These links are likely intended to facilitate phishing attacks or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://philabc.ru/uplcv?utm_term=gest%C3%A3o+de+pessoas+livro+pdf PDF link annotation
    • http://uptownchantilly.com/uploads/files/45966617721.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/nigibezikadi.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/kedifotajise.pdfIn PDF document text
    • https://cape-electronics.com/media/file/nebejodeneki.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/80266376875.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16076d0ab593be---2601510737.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/fuxivirimut.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/domofogobawekojamaxoturum.pdfIn PDF document text
    • http://renovator.cz/files/file/68532875785.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/8c9bf93d47e233c52f77594ad3676737/musubazibogumajosefi.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/06/file/202106171305224607.pdfIn PDF document text
    • http://adveotec.com/img/file/jopuwojiza.pdfIn PDF document text
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/xiniwijelepusujege.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/27df2246e5b83ece5ad6d4ec0ffecf82/fopudi.pdfIn PDF document text
    • http://bptramptour.pl/files/file/96331048438.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/bc0614e8ce7faf8abff28692bf60ac9a/5287893351.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/k23ic97pdidj45nd9ojipjlhb3/70404863224.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/kumupijemasaloza.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/guvofalilojaf.pdfIn PDF document text
    • https://t2sc.me/userfiles/zexobewawemibidadawupu.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/dogefovusojapow.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/rovuxug.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/c4bae3c0a22819f978fe1171c62fea52/situwebesemubima.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA2 19708 bytes
SHA-256: 68aeba3da997477982b5646300f635a5092a462bd99d9f008d80f739c4205f2b
font_01_sfnt_off0000fc95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC95 10760 bytes
SHA-256: 9b6227e43c229cbcbc5a9e62e728a00d6bd15d1df25a14146e8dc40a4bb90e5b
font_02_sfnt_off00011518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11518 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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