Malicious PDF — malware analysis report

Static analysis result for SHA-256 22d39006dad1b067…

MALICIOUS

PDF

96.4 KB Created: 2021-08-31 09:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3f28fcbd3f1bfd634125c1314ef1503e SHA-1: b6edb15f348ee2af6f98832c208d931cb33b7197 SHA-256: 22d39006dad1b067b18a764400920c03295f7b372c51528a3619641f0ea524a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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=ps+vita+god+of+war+chains+of+olympus PDF link annotation
    • http://szentimresiklos.hu/upload/file/21176059681.pdfIn PDF document text
    • https://proxus.nl/file/guziwuxexuzapoti.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dbb169e346f---ruzigemilibim.pdfIn PDF document text
    • https://transit-connection.com/userfiles/files/70264015298.pdfIn PDF document text
    • https://pmfegypt.com/userfiles/files/57052233123.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/49997075876.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/53752147966.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a666a94c3---87659207761.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a490b57bb9---wafolomobufe.pdfIn PDF document text
    • http://vietnam-intraco.com/webroot/img/files/35700434098.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160edf24fd7f42---mekoxadebubavar.pdfIn PDF document text
    • https://webmenuplus.com/images/file/64397838466.pdfIn PDF document text
    • http://xn--9i1b14lwsg1seumdzsx.com/upload/fckeditor/file/90347110998.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/tenelopufaluzupojuzojibi.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4f003eeb2---jukad.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/93766236320.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1611d3a3cb06cf---25047179418.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d83d05174413ca99dbefb4e21c4f980f/49608956361.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2e9837b36---juvewexewuvinegudilibem.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ed3a05a062---51634617629.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/33740988750.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_off000110ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EA 11304 bytes
SHA-256: aa4c2eeb76f944d9804dd3170704224cc2f71345df21622862a29a9940b5cf4f
font_01_sfnt_off00012b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001433f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1433F 18368 bytes
SHA-256: 13222094bb50e7acc00259b2f954b0d33a0436137a6786070fa6024de22bb6e8

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