Malicious PDF — malware analysis report

Static analysis result for SHA-256 434f472dfeaefac4…

MALICIOUS

PDF

84.0 KB Created: 2021-06-26 23:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 5c334d91a2f6b04b7880653ae8ae19c6 SHA-1: 1c382dcf2a5ad163c3ce4bc652fea3ac73a9f167 SHA-256: 434f472dfeaefac4784f2a5b65bafaf8f775183aa5c3b8a66081767d05a66e6c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically identified as a phishing or trojan distribution vehicle. It contains a large number of links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content. The presence of a link farm on disposable hosting further supports its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://drafthe.ru/uplcv?utm_term=mind+divert+meaning PDF link annotation
    • http://www.motorradfreunde-toggenburg.ch/up/files/84377655547.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/915409aac2fb83952378447f65a95f5e/nexawapipogusedamamodawo.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb01ac2ee1---ropibosipukis.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/9cf5f9cccf887745a0ef461a9893bead/76332428157.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/deaabaade0feed4d30f9431fc4b75aa0/71975374415.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/kuzarelajiro.pdfIn PDF document text
    • http://webhenevents.com/clients/868374/File/goponafurirolulara.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/wetekubaxedixasupeb.pdfIn PDF document text
    • https://bursac.net/userfiles/file/dulanojoxurigifagozo.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/024qocbarkkuhpvfp749ab9tl6/banunolijukazuvazipe.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087809499502---jagavisegegebebaxek.pdfIn PDF document text
    • https://promise-land.com/upload/file/gurufazebun.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4dbd46abd---zubijal.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021052211494199.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073eeb4911cb---dowazegazikekave.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/171dc0c2a140eb5ae77d751449383569/wimatinonure.pdfIn PDF document text
    • http://mcutech.net/files/67049245569.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/35821853713.pdfIn PDF document text
    • https://lymfologi.se/anvandarbilder/221/files/46936910819.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-28/20210528092042171597.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/4c24b94e07e679453283535924a9bbcc/99905087271.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/uvse66up85po81emde97b9brrc/88190832384.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/nevaxupabi.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD9 18180 bytes
SHA-256: cfcd40477e86ae18ce99ea9a7626c5cac1bb848640ad39f1dcfb3aa1cf185e32
font_02_sfnt_off00012a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A54 10316 bytes
SHA-256: fc4526aff0822ced188cb8462d354a786952ef2d705300c341caad7f4f3f5cb2

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