Malicious PDF — malware analysis report

Static analysis result for SHA-256 2323650bb9ca50a3…

MALICIOUS

PDF

115.2 KB Created: 2021-07-01 13:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 0f2636a394d78f36b11e4469c422f8b4 SHA-1: a5c1a2a14fa19850e92a830de95f35ee460e5448 SHA-256: 2323650bb9ca50a325406b848e2408496e0e67561a2e7fa47457dd34143f653f
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and links to compromised CMS upload storage, indicating it's designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a link farm attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9669

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://cructi.ru/uplcv?utm_term=personal+vendetta+against+me PDF link annotation
    • http://jcon-aps.dk/userfiles/file/40168229149.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec8413742f---13222235422.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/nl4bb7c3qoksdb3li7g9ddde57/49805025885.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160824609b19c3---mufumizokatebox.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/kuketapirobomidodunu.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/98f48e084p5vljsi1ts02eijo9/95849053431.pdfIn PDF document text
    • https://coil.hk/upload/files/30675511894.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/86186829095.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160adeb1275b3d---68198535856.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/f12995ae7764abcd42f464b36def9cd8/97107818595.pdfIn PDF document text
    • http://nandeestationery.com/userfiles/files/33033749352.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e926f3d713---bipekemasuvu.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/e7f1e6bfd1337b0e13824719f16c415c/vutasorofukeve.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798bd10aea1---rekowoketalafofoxivof.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160942bb6080a4---62337923330.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/cda0875dbfc67301055124cc07cb38e9/37126516907.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/491a85c71d334186d61dd473be631087/fabagitax.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/021781e2c9fcd1f0acc7c58dc13cc606/72721321555.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/6032qlv20oudu8n5ousmjm4mh1/nazumepukijopuvap.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/4c3ad44864b51f2f5d999a7c261d006e/xuxemurumiguwozeza.pdfIn PDF document text
    • http://toonesk.com/upload/68008560350.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/debojike.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c776a20d7a---rapewovu.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a39215e6a3---nagisonafamifofefi.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00012bbb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12BBB 22836 bytes
SHA-256: 6c3b6c587760bb776ddef2d9dc243663e74eeb4b2f3038eda6e2a30e6dffaed8
font_00_sfnt_off00011388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11388 10660 bytes
SHA-256: d291b0c25e8930970b1ae10b29b44dd7a1daa7a3c0e19939667b133a0e18e5e8
font_02_sfnt_off000154fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00016d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D08 4048 bytes
SHA-256: 99f28f88f8a4a30fa8627cf15aa37bcd55505bee2266bb0a54ab8e06fbf29991
font_04_sfnt_off00017c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C7C 26440 bytes
SHA-256: 37fa21be81d1c33312f29eabf083b51e0f275c78839cd8678589be26b00a52d3

Open this report in the interactive analyzer, or submit your own file for analysis.