Malicious PDF — malware analysis report

Static analysis result for SHA-256 22803367d2faf80b…

MALICIOUS

PDF

84.3 KB Created: 2021-09-01 04:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 630bc0d2f42ae2537a19408bb91323a4 SHA-1: bbef4e8d94e1fe0db8ed7201ac847d8e13b597e9 SHA-256: 22803367d2faf80b5e29298f83514dfa2f2ba501dc4beab7c2f2aa94d8fce6b4
164 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607359d6ebced---bepivatugi.pdf In PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/dagadiz.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/ca7f7352c9fd7d52dbece4c843e526b8/jufusoletapa.pdfIn PDF document text
    • http://medica-brno.com/files/pitadixilunemotipexupuwa.pdfIn PDF document text
    • http://elektro-galerie-hamburg.de/userfiles/file/dinutavefuxasato.pdfIn PDF document text
    • http://prestinoequitacion.com/imagenes/upload/files/wamam.pdfIn PDF document text
    • https://zemtechnika.lt/public/site/0files/24040194725.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160988d4fc4338---fadadejetimorokubigopiz.pdfIn PDF document text
    • http://waukeganeast1980.com/clients/877304/File/pabekukepiga.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/lases.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/78254433021.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/0fute20q9noj0vb18i4raukmv4/17340772917.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608234a61c0f4---46452554228.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/sa1sjil28sksiomhr268rr6d7u/84272374618.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/mugemali.pdfIn PDF document text
    • https://rajatotogroup1.com/contents/files/pimakenipababaj.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/482cc5eb7c380055f907dc3fd9c64c55/logabezorebunaj.pdfIn PDF document text
    • http://summithighschool1958.com/clients/71652/File/birowifixotanuzuw.pdfIn PDF document text
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/17506179109.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/sufivegizupexaru.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/zuvuja.pdfIn PDF document text
    • https://coluer.ir/documents/file/xexinuxobedok.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/07aedd921480de4acc5aed28b07cfb2b/15474482388.pdfIn PDF document text
    • http://mmsmarin.com/imgimage/file/zumunitijalibinulowam.pdfIn PDF document text
    • http://araonline.hu/uploads/file/wijepaxuvaxurek.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/fagedejesazawep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+to+pass+in+madden+20PDF 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_off0000e2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D4 18560 bytes
SHA-256: 5777aa56c339569e70f3381849ec923d4a5fe9ecd6ee0e12a6cee616ff06698b
font_01_sfnt_off00011362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11362 10728 bytes
SHA-256: ffc3848254307fc3ed5fd27d3f1f2cf02bd8d840215a594df2a3beb29c837a01
font_02_sfnt_off00012c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1