Malicious PDF — malware analysis report

Static analysis result for SHA-256 80deb397807991e6…

MALICIOUS

PDF

101.0 KB Created: 2021-07-05 12:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ed6e0226aed1553f8fc58ab5bc1d9b5f SHA-1: 4bdcad7c3160585a754b792bb19982ecd1cebd92 SHA-256: 80deb397807991e6f5b2617feb2af477bfdacd9843d96122da20beade1473773
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URLs and link farm structure are key indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9711

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://doggystylzgrooming.com/admin/photos/file/58029675866.pdf In PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609c85ffa1ff5---goridavodig.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/29602927813.pdfIn PDF document text
    • https://coluer.ir/documents/file/durakajena.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/fuvufewemuwadikuje.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/tuvigez.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/be2d41d2f1c00af507900dd4bdac6e75/71289446588.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7ad399ffd3---39816458658.pdfIn PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/vupasiwupoto.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/xitemakidokuzepogogake.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160d47af1ce1e5---60052746359.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/72780827726.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/7cda6d004cbc71e2252bb07a709fba94/nosije.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/79d368d3e1fb632bf967263c86238c79/gamodakokojukupubug.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd2aca477f---xasuseruwizodajob.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/46581998140.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/sioc0vuihji37s3hhasmna6d1q/kasasumedofawo.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/81263095950.pdfIn PDF document text
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/lirijixatirup.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/edcbfe56558637754864ff7b435ec8f2/tapiwenodopivejexalaliz.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609c429fcf3be---82322184998.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/8ov0nii66qbf15kf9f0tvbfr9o/16433376312.pdfIn PDF document text
    • http://www.buildonhope.org/file/46227112351.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/xebafererazabawuxobolixir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=the+meaning+of+discombobulatedPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010936.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10936 18328 bytes
SHA-256: d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60
font_00_sfnt_off0000effd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFD 11024 bytes
SHA-256: bab276e3557e2294d468b4e7a2a1f95f737039995f3f8bdc32440d5f9ae7f1f0
font_02_sfnt_off000126d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EE9 23264 bytes
SHA-256: e0fffea9e4fb06ead03c5fb1af7c3c2edff1b89b4436faa9178204b40473807b
font_04_sfnt_off00017833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17833 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff

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