Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ad61e18db85764…

MALICIOUS

PDF

95.2 KB Created: 2021-07-06 02:53:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0798c113735704b49e24e297c4bf4942 SHA-1: 87285eaa0b3861858432f6c7f859fc8ce8ed0041 SHA-256: 24ad61e18db85764367408305183db7cdbd6c7f512a068cbfdc9d224877f56d3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common technique for distributing malicious content or phishing lures. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure suggests the PDF's primary function is to redirect users through these compromised hosts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://fantalife.nl/userfiles/file/42466192396.pdf In PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/3766d054bfe340397c21f233df0b8224/76294096882.pdfIn PDF document text
    • http://altinay-law.com/images/file/69599936100.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160915d7d699e5---polipilowetiropatojexi.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/cusr61ua9eql5o6ugov1eap0uo/voturowaxolazokidu.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/5vrq21hl2ts25n2ijbho47obt0/xuroxujaverokukiterarit.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/3477c1beb4a4a803fc07c63503b8e426/7670569037.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf89f21c4b---15210951578.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/roxivelexewixikuv.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/n9usrbhoomq423n1afol14chh5/26102682566.pdfIn PDF document text
    • https://turbooto.vn/upload/files/mazosowuvibenakavas.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4feda64536---94169734721.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/709ebd7eabe1981f5b576fa401e62e18/xapedodipusefitejakezul.pdfIn PDF document text
    • https://stopserv.ru/files/file/xepomevelixugadatefugonan.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/c5e8afa2d30ea00acb975902ab3665db/dosazukesalof.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/e899b959b581638c763a896a3b125fd2/33904681381.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/36535965832.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11dead003e---10360648786.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/oh0638antcauja49dlanb736e0/35854109004.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/31649682981.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/watokopelomijuvo.pdfIn PDF document text
    • http://polipack.ru/content/file/vodupuvererezivenoxudawu.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/8faad1c1826165f3fac7566b283acb7b/8373297851.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+to+spawn+villagers+minecraftPDF link annotation
    • 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_off00010fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB7 10964 bytes
SHA-256: beba9fa1a3192de1088f28622b2d2aa44577a280e2668c66ece14459c38b277a
font_01_sfnt_off00012937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12937 17544 bytes
SHA-256: 0934d60887602d8c5cde9aeaf9657e9e3edd5a91a59051b5b84c02ab62ea9d98
font_02_sfnt_off000157a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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