Malicious PDF — malware analysis report

Static analysis result for SHA-256 0321948806caac4d…

MALICIOUS

PDF

86.3 KB Created: 2021-08-18 12:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ff75e0dbe5583437c7db2483a49438b0 SHA-1: 6c2a115e3f1f49f4c11cf33908aca89b6102c09b SHA-256: 0321948806caac4d6e29283ac4e4404172a9a4e1bf5d6fd99f53b2952382068a
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, suggesting a link farm or phishing lure. The presence of these links and the overall detection indicate the file is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://pixomot.ru/uplcv?utm_term=how+hard+is+the+georgia+motorcycle+permit+test PDF link annotation
    • http://cloverpark1959.com/clients/51168/File/bufojojibaralatuni.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/buvagurobave.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2df458c7b6---35757375268.pdfIn PDF document text
    • https://langestrand.se/anvandarbilder/204/files/duwof.pdfIn PDF document text
    • http://vhs1962.com/clients/b/b9/b967f936f519796c2a696a6ed1da67f9/File/gudopegodemawelopipelujej.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcb21f0f614---tojidute.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad7fec332c---kofit.pdfIn PDF document text
    • https://kurishupally.org/userfiles/file/vumipuzerefi.pdfIn PDF document text
    • http://polkovnik.su/upload/file/zidipadu.pdfIn PDF document text
    • http://lammermoor.net/imagenes/file/kifopimoguzaw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d89588321ab---39285612081.pdfIn PDF document text
    • http://quaint-house.com/images/blog//file/3872591986.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/7f307a8b5796c93566a0802f1e142bbd/28790005057.pdfIn PDF document text
    • http://natproperty.com/userfiles/files/wurovarijidowijuxe.pdfIn PDF document text
    • http://www.asslar.de/downloads/getogezajob.pdfIn PDF document text
    • http://argyleliquidations.com/userfiles/files/59153476494.pdfIn PDF document text
    • https://beaszemin.com/files/71235936279.pdfIn PDF document text
    • http://mywymc.com/userfiles/file/21669015958.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d87bcb0cdd2---19494945946.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/25624763905.pdfIn PDF document text
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072cbee8ef8b---kudowikiveponebuso.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/2f120ef595dcbd9f0e9acf2a962dbcc3/52564224597.pdfIn PDF document text
    • https://lecachet.fr/docs/files/tebajinaduzazitepexoleju.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/tj7tvvf8n4fffcnh15q6ed7nch/30015770136.pdfIn PDF document text
    • 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_off0000ee72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10684 16820 bytes
SHA-256: c4c1300b403d82227edb6e6e1a9beb753fe6b2ffb0aeb5fbd13597e21ccb0e6a
font_02_sfnt_off00013233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13233 11048 bytes
SHA-256: aaa5f7b5e211d743b65fab19f90299b422a46b58a54931aefccbd6028fc59571

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