Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda2d57cf41b912e…

MALICIOUS

PDF

78.2 KB Created: 2021-08-22 00:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0445f6647a94121cb245530e763a185f SHA-1: 6c3bc2ff21ef3c9a8fa1d970dc68da1d583b6862 SHA-256: bda2d57cf41b912ec6fc8599fcc1a00fdf54d44696a4065551a1471e8097ccc4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML and ClamAV as malicious, with heuristics indicating embedded JavaScript and a link farm pointing to compromised WordPress sites. The presence of embedded JavaScript suggests an attempt to execute malicious code, likely to download additional payloads or redirect the user to phishing pages. The numerous links to potentially compromised domains further support a malicious intent, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/4nbvgum3e90g6bjq2s9skgilj5/19936790226.pdf In PDF document text
    • http://soft-pro.hr/upload/datoteke/12077308679.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/35689738764.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16081cb0f5b573---88442162549.pdfIn PDF document text
    • http://springbook.no/files/56548263217.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608629c42b0a2---xumazalepufujatovin.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/67688459575.pdfIn PDF document text
    • http://vendsol.com/userfiles/file/juson.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f6244e9cf---53456549505.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1625166088.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/58317693411.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/73859493444.pdfIn PDF document text
    • http://canvangdientu.com/images/file/ginazarod.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/52392557476.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/fotelevuxifat.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/zoganosuwuwabarudapozex.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/bakigajekatedivevofevagu.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/06/files/210626133010.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/sawola.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/3cee39fc3be9e917cbaf536c6ab4355d/nevojorajavuvarirupasuvu.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/tutotoxavo.pdfIn PDF document text
    • https://www.travelknowhowscotland.co.uk/assets/js/ckfinder/userfiles/files/31689082062.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/0nrk865f1mlpa8o3hjk7os73v6/76968131666.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=bajana+patalu+telugu+video+callPDF 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_off0000cb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE392 10768 bytes
SHA-256: 6127056b8ef77faaf6ab6271c23a07158c85bbd09580683c10933dd2ee915530
font_02_sfnt_off0000fc40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC40 17476 bytes
SHA-256: 56d2423fb00d85034b775e697eeeb913502ed8c35deda2b20306a394fb762254

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