Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a83e3952129945…

MALICIOUS

PDF

96.3 KB Created: 2021-07-13 20:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5b8694fca28907950bc3687f2294b141 SHA-1: 1d59bbe40d99fc8eb3fb5e5d8e94a7e742e774db SHA-256: e8a83e39521299458e4648668c3d8647ef5486e3c183eb2fd0a0d2c5aeb26847
164 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, suggesting it is part of a link farm designed to distribute malicious files. The presence of a 'download' button heuristic further supports the lure-based attack pattern. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/bbdb8e97368371ffb664fb928bc5ad74/gofomemefofonegera.pdf In PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/1b1d007d752376108cdf58f958a1853d/wozezizod.pdfIn PDF document text
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/nezekuluwowirevuwiwumorik.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/54256297959.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecd8c82243---87495685510.pdfIn PDF document text
    • http://nlureunion.com/clients/33063/File/zemijoge.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/0cbe4512b820d4b182ece9907afb1652/37700972845.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/ifc3dr95hfi8u98d0pk7d3vl9q/zelalinuwulebotidowode.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad7a7664d4---87502401277.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160960decf33ad---15090599845.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/4f40d958c1220c7c23194ebedb735316/mebenosexalewas.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3e755a339d9e3ba51264419ea210ffcd/22043810147.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/jozozugewoxopefi.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/d05f64b89c01d420a8b0a688463c4dbe/76993589309.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/ae5161ef09f7ea9cf89a6288320cc229/fujobaxezofisusepifis.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/7596f6dc7c7cfbae97d963d265bd5f14/59632687533.pdfIn PDF document text
    • http://daydala.com/userfiles/file/76943783673.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/f3a0661dab6fc9dcf029dd3694f4dd54/31550533018.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/76048809135.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/44229681411.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b0967c3cd24---surubatagi.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/5d140cf61d5f5fd6129619fd81844cb8/36168002617.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/lixaxakifobezabavutomom.pdfIn PDF document text
    • http://gloria-eurex.com/75032312070.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=conjuring+2+movie+tamil+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA53 10956 bytes
SHA-256: 0d4444263a6760c579c4e82f9ad82cc8c2250bfb3f8b018573868b12d38757f0
font_01_sfnt_off00011392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11392 16988 bytes
SHA-256: 67870c5f86c152146f382ba865906703816c50006209b21754dac678b3b4d68b
font_02_sfnt_off00013fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000157eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157EB 17856 bytes
SHA-256: f1461f5c2f6b23ffa785187b73832d09a1eae30f93f70ae0378ba1c88a0eb166

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