Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceaef5c028733f64…

MALICIOUS

PDF

101.4 KB Created: 2021-08-09 20:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4046ee332ea0515c7db94f53f3571541 SHA-1: a107430e0498f43212877ee831ee361bc5a8166d SHA-256: ceaef5c028733f643c58ef21b08ba613b5e28a9396ca30c0ab376ca8b1fbd32c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to numerous external websites, some of which are hosted on compromised WordPress upload directories. The primary attack pattern involves luring users to potentially malicious sites through a collection of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/68707tqkfj3o34hjsc71vf7o2g/xiwob.pdf In PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f77b5b2bf52---pafuduparoz.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/wogekozi.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/e6gd0ivtf82nn0lp8sdcrr90jk/83584573050.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/bafomolofovanexa.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609d344a5f496---17833100957.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/16e90d4381a9cb248657174961b7a02d/jumuzojagosolawabedir.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/106308113.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0296e2352d---29935770701.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/ss396k7o36t4cp43jmvhfkpmgr/74015883618.pdfIn PDF document text
    • https://kenadong.com/contents//files/99829011030.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/a6b2626f507e05a307e35726b35746c9/bejubonimozavepibojete.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/46977437131.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d9268375a31---kaxolufikurivadeji.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1606cef0e54213---lanolubafevak.pdfIn PDF document text
    • https://vestol.bg/files/file/58937124330.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/57716251624.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/30d8998542704047fc1361d5e401c8db/68418387873.pdfIn PDF document text
    • http://articolo17.it/siti//usr/foto/files/8037773564.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef52d8d33f---80415468770.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/8rv0dornv9jsg6pt6basrk11s5/23948813894.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160761f0139927---54208314730.pdfIn PDF document text
    • http://borisovhlebprom.by/var/upload/file/87532881370.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=conversion+de+fracciones+a+decimales+ejercicios+para+imprimirPDF 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_off00012147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12147 19928 bytes
SHA-256: 912de7bb5ee838cc8a08d166c4a1cff8f7b0787afa93091df7b7ae7155823f68
font_01_sfnt_off000154be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CD5 10912 bytes
SHA-256: 6891787cdab3d35e23af5511e72181a823d27790313bab79763c9fda098e4f43

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