Malicious PDF — malware analysis report

Static analysis result for SHA-256 689047f46b6b2974…

MALICIOUS

PDF

91.3 KB Created: 2021-07-08 10:14:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 31d801736ccf96bab8a89aa2bf0cc4c4 SHA-1: 1d799b38592890289c23bc4d97ab5e5d61d14377 SHA-256: 689047f46b6b2974fd29718aef4f99704819447ed86a7d81e82b3a8c82c88675
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://inwebjor.ru/uplcv?utm_term=question+answer+of+chapter+1+chemistry+class+11 PDF link annotation
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/agjmhs54k96003kck1ca34k9mf/xezolor.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beccffa3976---nusefejupasoku.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076fcab8c932---fajefe.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae86088d36---11598030744.pdfIn PDF document text
    • https://jewfri.kr/files/image/files/55473565294.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608723227d3c2---kominesoxubaga.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/39d6fa7eec38fd29e765743b8ac27863/72039834345.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d42224c9eb5e9d5010273813112e6fa8/72318335595.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/1gpgfvgf6pfb1a6a6v1r8nktsn/74458955329.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aaeb0d64bb---dogopolisegogaremowoxilab.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c277a8bf1f---xalijerizinuxagi.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/60510852325.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/kudezojuponabejokuvaguz.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/drqp41ggp0c76cf82jk8us87co/dumuxibelamaje.pdfIn PDF document text
    • https://digicpictures.com/downloads/mubukuvasefakujum.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a734b563e4b---41210110002.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/81126825090.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/6b272b0f6a2b9446f0d70f6c7ae62071/tutikonewagisosemekukup.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078443b3f937---11353806981.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a98cc1fd3f---14648192498.pdfIn PDF document text
    • https://istanajp2.com/contents//files/pulavebugimuvizuwojori.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_off0000fd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD68 11156 bytes
SHA-256: 53b77719a814b4389fd62699b4950b323c872f25165dd27cb62d8479db312f69
font_01_sfnt_off00011788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11788 18268 bytes
SHA-256: ae5956150d40568bd05e5a2c7f6fec856cc132f0fe8dc301be7a434caa230067
font_02_sfnt_off000147ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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