Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b6ea3929cb7598e…

MALICIOUS

PDF

88.3 KB Created: 2021-06-26 05:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 9794ed1bf0ad0d4d58a33ea2ab4be004 SHA-1: 22e9b49ac249a0d4078acec885fa77a0a609ee7e SHA-256: 7b6ea3929cb7598eb6c4364368b50385517a7d121f59870efc2de9bf2320dd1a
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing or malware distribution sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, identifying a pattern of using disposable hosting for link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/a613cec982eeaff7bb76c342f67e775b/zobujasapunisagiponoxaxow.pdf In PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/zufugid.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/jitakameneviguwilazawa.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/24953fe7acedde4fd8c70744211c0353/60532721578.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ff95deb7e---95374113963.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/gudipepidaxikopaza.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071994caee86---memor.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c2b785188---tawewawepasijerifini.pdfIn PDF document text
    • http://wonikqnc.com/upload/editor/file/1622241831.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/81809389639.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/qq54h06iefji2tavd1h41vh6b4/77749004724.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d554d3a610---fusibotebubetusiju.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/085d74a2820336b01c835d8a60005af3/82077338178.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/vanakaki.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/51597724217.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ba00528359f---18030880150.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b46bb1a3bbd---69524231495.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/wikimaxufubusika.pdfIn PDF document text
    • http://painttechvina.com/webroot/img/files/sewudewixedebanixapope.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/acb391b0e419bdab1e04616825db325a/26513949464.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/rekibovozumizaver.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/55f8c1344a0beaf922b5d4badc339124/40736353639.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/fmniuregirqdnpvvsuota453fg/30103686086.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/11608527529.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/1892593574.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=achilles+2+hackedPDF 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_off0000f744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF744 17512 bytes
SHA-256: 3b19b161e9a08e74869a4b7becd70e02e8a6369d87a2b41efdcc977c29f6f130
font_01_sfnt_off000124f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F5 10236 bytes
SHA-256: d56016ab098bae45c73103c635489f0dc7082b72402e5231bf9da6de5b900206
font_02_sfnt_off00013c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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