Malicious PDF — malware analysis report

Static analysis result for SHA-256 6220b86e89cb5828…

MALICIOUS

PDF

100.6 KB Created: 2021-07-14 00:30:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b5c4a7a67f9a06b31aa52dec032c61c1 SHA-1: 37a33270ac02d89a51de87438857e5d7e7bd354e SHA-256: 6220b86e89cb58283cae4b74ab34c13c4ce7ec816e9376e5f61b53dcb0e90808
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest it is designed to lead users to phishing or malware download pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071108758cff---44218947120.pdf In PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/a85bcc5ee49d97bb8cd9bbaae6664f75/xelidolisodubarubuxidi.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160905044899df---kamenobefuwubetufozis.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/lowofo.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/b80212daf0ef17ed5406d13b4044654b/17655173333.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/23028721090.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e481a5aaf---tusavemudukes.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/ke7ivk6gmqku1flsaglpb99jrd/sugolalamevokefozotiz.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfe343d425e---nufezorowogujepofawe.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/cfav96qeht6ost3j6eb6lmn6p3/ridozi.pdfIn PDF document text
    • https://aedwea.com/upload/foto/widirupulamuseve.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zonalotu.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/f5ffec6f630fa05dfe4a4a411131f2de/zobidozumuzejefowak.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20db934e6f---zakewupanesifike.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca5290e203---rufejokewinedomowif.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/zesezukosudan.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/minif.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/vuvunabofokivanuvod.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/dutixewuxeg.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607242ee0a9b3---duvalimaseremuwusage.pdfIn PDF document text
    • http://alkimosgb.com/userfiles/files/limemirivikimozopelenuz.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/10578225681.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a12205d6374---fobobebotewibuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=foster+study+abroadPDF 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_off00012826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12826 10328 bytes
SHA-256: f9257e1db9cd7226a980fed2e53aeafc925e8ab3f5808799c8e82b4a4c758fc9
font_01_sfnt_off00013fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FA0 17536 bytes
SHA-256: c72b90b0c18a1f03cafb9548ac9fa9bd238a7f60206df098555e6615970920a0
font_02_sfnt_off00016d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.