Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f5d96e48e80b9d…

MALICIOUS

PDF

85.4 KB Created: 2021-09-05 07:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 36e2052eab61abf8bf51fba7639028c0 SHA-1: 43a89c9799cd3de14e6f1280f3f8c1971d4e7bce SHA-256: 22f5d96e48e80b9dd98d926afa7b1fc1d1c6e1c1bb83332fc5996189d0eee962
176 Risk Score

Malware Insights

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

This PDF document impersonates a cloud file-sharing service, a common lure for phishing attacks. It contains a link farm pointing to various PDF files hosted on compromised websites, suggesting an attempt to distribute malicious content or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608aafb7e16a4---gopepezami.pdf In PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/b63db8d54222ec5704e38f9b07c00956/8867278394.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16083b60b59188---79377294769.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/fogubefeve.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16207801651006.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/79292918502.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/jutalez.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/tupawiwipus.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e290c7329d1---88893540816.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/392c744f850d3791c86b87e489f34f53/fetejonapuwisetedobakagir.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16301714240323.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/jrebn6am52j6ut8no6avep8ing/febejo.pdfIn PDF document text
    • http://life-worldwide.org/assets/uploads/files/vepujulupadobuvafawedimiz.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/32vd6ddshftdsimk1873esjec6/67587080490.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1610e77cd43ec9---62846770248.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/q5h7v06p34lq1fm10q1f40e425/50987057064.pdfIn PDF document text
    • https://aedwea.com/upload/foto/98128346898.pdfIn PDF document text
    • http://makaroma.fr/upload/file/40302892463.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b34e68f9e---tafemugupomofaji.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/babe498c7b1e5dd863ec3fe9c9cbb825/xemirabinurikukewoneri.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e728ce538f---givemevoru.pdfIn PDF document text
    • https://nisahanpin.com/calisma2/files/uploads/jegojepurovikageforo.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe0a85f5ec---58105462494.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/medanutexuw.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c415c6e292f---sufisoxovan.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/redeloforibujararedor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=pdf+editor+offline+free+downloadPDF 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_off0000ebf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001040b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040B 17332 bytes
SHA-256: fa9335fdf3c3fc2b0c288f9ca8e9f76c2664a8e33113fdd62cc90a0b57a4c4cc
font_02_sfnt_off00013090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13090 10268 bytes
SHA-256: c8393925d9115be24b384483777e38eeda95f86ed0287a1f735b6bdc7b641b10

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