Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed3ff9b6ec2d5057…

MALICIOUS

PDF

82.5 KB Created: 2021-09-01 08:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f62c4c6330b7fdf42b624c66fef5ab1c SHA-1: ea8dcb1e81852fa5b3418d3326aa61b07c637327 SHA-256: ed3ff9b6ec2d505745d33e8ca2fd4971cc44f79a7f7873f000647fb1b53c70c3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised websites, likely intended to host malicious payloads. The 'ML_NYX_PDF_MALICIOUS' and 'ClamAV_DETECTION' heuristics, along with the presence of a link farm on disposable hosting, strongly indicate malicious intent. The embedded URLs and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/0bc9fcaa8f7021fb6528a978c6192b35/70142932835.pdf
    • https://ashleymongolia.mn/uploads/files/77907117674.pdf
    • https://hagakure.by/upload/editor/files/tamazorujopelofawurumidir.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d46c2c774---52285689513.pdf
    • http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/93186566469.pdf
    • http://barudan.hk/UploadFile/file/20210802060232793.pdf
    • http://akcjonariusz.com/UserFiles/file/83852185699.pdf
    • http://cesmclassof68cheyennewy.com/clients/82478/File/90897256531.pdf
    • http://detikakdeti.ru/img/file/71965700235.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/86bca1be1e970094cc240021229512e6/zubasitumefebe.pdf
    • http://metabolit-plus.ru/files/file/watonavu.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/8aaeb98aca99f10a5ab665a1669d15d5/tawaji.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160aa85d2e055f---76841528670.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fcc69d8bfe---17700920985.pdf
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lipiletezuvuva.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c153db43cc1---75198997505.pdf
    • http://myphamnanyno.com/luutru/files/xenigolupawega.pdf
    • http://berbun.com/user_img/file/letopulapatuvupimuzev.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/g02jik7b7sv0nc72ctrsh0qb1f/91863223453.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/tbb1sjlq428km3vv7852ksp95l/85903402567.pdf
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071bff3ad0fd---valugowevimukuvubakaw.pdf
    • http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/nenirarosubakalugodavaful.pdf
    • http://mim2010.ru/userfiles/file/gevurudejav.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/9b6d7e398da84faa67ff655c998119b3/39823972154.pdf
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/jnclt75kbgi2vdrd4l16cqqt4f/36678845662.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=mp4+juice+free+music+download
    • 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_off0000d7c7.bin
57638946f3dd2d4ce32a5aedb51cf0db6449431f8ed6112e16cea8f808d98732
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C7 11072 bytes
font_01_sfnt_off0000f1a1.bin
363a13fa90654a75acd86cf0ced42d1ba385f3f40b2e428ba058aea31a630655
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A1 19288 bytes
font_02_sfnt_off000123a1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x123A1 16792 bytes