Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3562a3610001ca…

MALICIOUS

PDF

89.7 KB Created: 2021-07-22 12:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ecf46c2fc2166c7cf7d61c7ad30b3ce2 SHA-1: 7316519b0719a361cc9dba3e4993318501f68146 SHA-256: ce3562a3610001ca1388e2706cb09f7e3b9a86b01d80a11aefd23990455f73b1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a link farm with numerous URLs pointing to compromised WordPress upload storage, indicating a phishing or redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to malicious sites. No scripts were extracted, and the document body was unreadable, but the heuristic findings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16092fb1de8c4a---99727893575.pdf
    • http://lifecare4all.com/upload/files/47230659667.pdf
    • http://4998horo.gmmwireless.com/contents/files/38618312531.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097b46676fda---24385589659.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/0c994d604113b2044af14ac64dff9794/fitevobe.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/980rre19eabbrq2a8s1o6mrsob/45297776911.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/ep6soq2r997p5mim6muus4r1v7/71184593880.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da995d0d328---56055878279.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8eecf18bf6---xadokef.pdf
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/ne909ch9rtml4pqsn6ust8o6a1/sobadodoto.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/l8he8eu4hfd7puu09eob3jncs0/36101346889.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c50917a63---5138684943.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/25e26e353929765302a6b1702d4623b5/kakuroti.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/8tfe9tc7u499kt9a518gg2r9mr/tubosowazad.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1b2923a30---tuzixaxefomefeperigaba.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c29ac58bf1e---tizixaropujin.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607cd114a72db---susogujawenigakeritufo.pdf
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/pegutemaretamifitoguzek.pdf
    • http://www.recko.ru/ckfinder/userfiles/files/77222371225.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/76b2c1cfe962fa4e36df46dab677e8c5/jabekolevajix.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72d3e8f7f9---32466959068.pdf
    • http://albertopizzetti.it/userfiles/files/wosanakazan.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/9adc91019f46ee9567f4cf88f6c6cac4/83539035334.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=pronoun+meaning+for+kids
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faca.bin
6627a4e1a109125c7f8b8019455d0283980c1b9c7b8b4c5d6dc3209d0d017845		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFACA 10748 bytes
font_01_sfnt_off00011342.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11342 16792 bytes
font_02_sfnt_off00012b54.bin
07a1a9f5de68b33db44c28d5d9945afac6fa2faef30dc1efe76b107357e82781		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B54 17200 bytes

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