Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ce492326cc65bd…

MALICIOUS

PDF

88.2 KB Created: 2021-07-02 06:38:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 29c4d04c1bc352d4326b5d1dc7ee25e3 SHA-1: 35ad2293f0ad05dbb7ee28bb054e0ba76a965fab SHA-256: 20ce492326cc65bd00e631e0bd0d6af7670666251bd86af3094f301af15bc8fd
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to compromised WordPress installations. The ML classifier strongly indicates maliciousness. The primary purpose appears to be to lure users to these compromised sites, likely for further exploitation or to serve malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 5

  • 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://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/52ae487dda68fa7471e020888290597b/66380561948.pdf In PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0ca8eb606---48810325949.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/54970840526.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/cdb9e9b84878c70c2e0add1e82cc59ca/jigewusudozerosisug.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f3669079b---kinativojupojosiforo.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/toxesajopisusutog.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f732854192---wudekatez.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16094987b489fb---zojalisivekifop.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/5bfa6e7ea54a56922f33071bf98e0321/dukeda.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/92725b5816b75582dc5a17b068b80f21/denanamadalisatoxolapak.pdfIn PDF document text
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/51239261451.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/64cc12137efa5f65a067e7c11ac5e572/mizazijasutosu.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/85993915647.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071a0a4d3a07---bowexojolese.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/j77pumbbcms1avp0qnunnoo971/bewufedudodixozidex.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/51369780911.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/5k4o4f67g7ejs7peuq76kjr9mp/fopag.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/f3esj4fu14m946dr5lgrd7r2sb/jisugarilizom.pdfIn PDF document text
    • http://vanharteyoga.nl/uploads/files/nifokaper.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/ip3rr31j3nahucavbnmk3dldpr/43061123486.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/jafefetezexosi.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3051d1419---xiviw.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/14b4fae677861a073947aec1c7b74750/33931080350.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=usa+today+front+page+pdfPDF 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

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_off0000f170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF170 10656 bytes
SHA-256: ea454175d193ab649a8d5804ed6b81dba0b3499047847ed50a9844f25f3c55e1
font_01_sfnt_off000109d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E5 18860 bytes
SHA-256: 3dc6f20a3ca5658db724d0daa987c5f36298803ffde47d97968cf9a04b9f3b00

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