Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe2224a6b9ce73d…

MALICIOUS

PDF

99.2 KB Created: 2021-09-03 21:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1aae58b02fbe085656a5b356bba449d1 SHA-1: 4bf63d3c8f44b6a05080bd55c6ac891de675c525 SHA-256: fbe2224a6b9ce73d1b742cde636b2e2680868230dbca9a690a6102386f3d4218
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and embedded URLs are indicative of a malicious document designed to lure users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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 http://shriadinathbank.com/uploads/biburonajawopas.pdf In PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/7bd5b16af3b6764ad6c8ed3e035cf1ef/26608815844.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/gogubosoluwitef.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/dupusuzasunu.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/rd07037dg932mef2kc3fnhrhu3/xifenanuvunalopizipo.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6091e3eb23---bupisivorodoroxas.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/a5c1bed772069474683d72b656b2125f/wipodigerufuvu.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/f5954ae247956a9562aa88c26f6642ce/27635915730.pdfIn PDF document text
    • http://timnhanhonline.vn/upload/files/pusutefobapixuvamuveku.pdfIn PDF document text
    • https://kirmatas.com/userfiles/file/fukotopijekodadipusotep.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/42927983612.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/cb5024dbc874ad1ca7c9a6c7c41b202c/98703048010.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/biguwisuzasuto.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7b671c072---xonesufubotokat.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/847309225.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/jelotosomezezapoxofener.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/64034120806.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/bvt44ed8gmj0pco2oaufec1344/23687112622.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/buslo0vebbhp4ilom6qei3kfgt/barikomukufader.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/magosegoz.pdfIn PDF document text
    • https://nidi.mk/ckfinder/userfiles/files/tudozomezawerixon.pdfIn PDF document text
    • http://flexicourse.cz/res/file/93691932673.pdfIn PDF document text
    • http://yachtales.net/admin/userfiles/files/14736968272.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/sumakunesalo.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/67f0a443c7ab92f2ffe61ce306e369d4/fifumur.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae0d825300---tawizebe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=sentence+structure+worksheet+grade+1PDF 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_off00011543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11543 10916 bytes
SHA-256: cb0568f57f77b3a1372ed30aabc47aca5a7e891a869f4ecfb4973ec98944a1cf
font_01_sfnt_off00012e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E6B 21416 bytes
SHA-256: a0c3a558fbbbf4cd7b63fab530293a9f52a534a5c3ad50e45ed01a07252d0690
font_02_sfnt_off000166f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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