Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d75e62d65b6e7c…

MALICIOUS

PDF

88.6 KB Created: 2021-06-26 01:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4d43b5a774c605d70fcdbf901df7e711 SHA-1: 11c1c55fd54a86c18cfaf716d9292d23bc0724de SHA-256: 67d75e62d65b6e7cba07d35eb8627eb7fdf23979dca1c07f17405eb6d882a4b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of links, many of which point to compromised WordPress sites and disposable domains, indicating a link farm designed for redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://nmcs.ca/userfiles/files/zifuwatezarulupasapu.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/c2qf2jc8dh76uldc05r4pkirm6/likoganuloropebewejeso.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/f2734a2ab27cabc0a5dcbd6efa41a317/5291458339.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/ce78b6bf88e0c64818c1b6c27c1f1f28/binagonifufat.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16093adeb5ebd7---vavokeziravaxidekob.pdf
    • http://meyergarden.com/ckfinder/userfiles/files/fixogoveritaviri.pdf
    • http://poltinka.ru/userfiles/file/wifobitejujamavokavonebi.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/4fba40d94b1b409f94f0a0622c2a01c7/59258221167.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff18dcdf1f---58683875502.pdf
    • http://hakkabrothers.com/userfiles/file///zogike.pdf
    • http://transchem-tech.com/Uploadfiles/files/wojokexelovimelowe.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4073caeb5ea63f7e3b7da34ca54b41aa/85524499742.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608142f807595---wipirujawilivokazopiregu.pdf
    • https://ferdavagnar.is/images/fck/file/62314710691.pdf
    • http://whalesart.com/uploadfile/file///2021052303281813.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/47af007355433bd6ce9361d3e35d288f/97712650105.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607959f53248f---kudarigogabulunamegegokuk.pdf
    • http://owtsreunion.com/clients/e/e7/e717deb27d844c69ffc49b2d3c0bb1a5/File/basojugejakokapanuwen.pdf
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/4882efc12c2d5f35671e502ddfc33364/18370906730.pdf
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/b36f51c783ce4798875b623a232a13f1/53424409106.pdf
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e21546c53---40383832657.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/vq0bfn0k18or71rf6c47hde4a1/47660415979.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bb1cb61ba---subowenasazobilolutun.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/a09ece0f552d3a8f2b49d3ee2ad855c9/jexuwus.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=binomial+and+monomial
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e302.bin
9119b3171635aaa0cbc956acd3dfc2008e21192e2aa73b31a09cf3df9183b6df
pdf-font-stream PDF embedded font (sfnt) at offset 0xE302 9964 bytes
font_01_sfnt_off0000f8ed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8ED 16792 bytes
font_02_sfnt_off000110fe.bin
325c5f5cda05429ae92d15c23118ca1b8712e485108c584e1e30b0ff615913b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x110FE 16084 bytes
font_03_sfnt_off00012626.bin
efc057c59ade34cf178e8a4de1d513b6fa41d2eaefb566c25fb626d0722892e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12626 17568 bytes