Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ce0b8515320eec…

MALICIOUS

PDF

82.2 KB Created: 2021-09-06 12:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2a011077513f46e803f105c139dbca42 SHA-1: 8f21cb16f1acce0270cb20008af046dbead39dc0 SHA-256: 22ce0b8515320eece4370e15b761e8498cc109e3175773ad5b3521532e6dbdc3
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://pistant.ru/uplcv?utm_term=auto+electrical+wiring+diagram+pdf PDF link annotation
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/679502e705a25e71f2a42c5b37997fd5/samixipofiziwimarir.pdfIn PDF document text
    • http://gistfamilyreunion.com/clients/8/8c/8cbf0a40baaab9dd4734ff2cdbb1e120/File/zixifeturazowugi.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/161537769560ee6bb379c54.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/52117604444.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/6797605111.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/sirotenowimudonimofipiju.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca4ea8e600---tisaloxasi.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/22789022613.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/15851336178.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/6bfj4m5jbm5tdnu04pjigr73dn/14139847657.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/bca62a7358368e1722dde5f1953bd982/75105021329.pdfIn PDF document text
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/85539640058.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/83795440858.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/kamasor.pdfIn PDF document text
    • http://rund-sro.cz/UserFiles/File/gedivedolekofakusesupog.pdfIn PDF document text
    • https://nucamsa.es/userfiles/files/61596544545.pdfIn PDF document text
    • http://www.giuseppe.ru/ckfinder/userfiles/files/2903672591.pdfIn PDF document text
    • http://www.gdchgs.com/admin/img/files/5850067563.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b256182623c---21150152022.pdfIn PDF document text
    • https://nulifeus.com/~nulife/userfiles/file/varewenexozabuwajojigixa.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e48ffbfc9d---87481017736.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/33260724411.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF502 17368 bytes
SHA-256: 610dd2f2a051265c76f894d02e6f20e0486e09dddd0fcab588d7a5e654e392e2
font_02_sfnt_off000121b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B5 10960 bytes
SHA-256: c68cbb26a6c0fdb5aafe64d6f92e5107655e8d54efacdd43f88f8fa3b1d53ca4

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