Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ab4a1c82aaf062…

MALICIOUS

PDF

78.7 KB Created: 2021-09-14 04:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9ccae085304ecd25727756ab0470ff71 SHA-1: cf8411472d074058780f97576932e89c97f60980 SHA-256: 75ab4a1c82aaf06206b63827672621994e42aa75cccd996fdd1d6705f1479b42
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, some of which are associated with compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading a secondary payload. No scripts were extracted, but the presence of numerous suspicious URLs is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://mrspk.com/ckfinder/userfiles/files/delosito.pdf In PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/64385096288.pdfIn PDF document text
    • http://estatepie.com/files/userfiles/file/10119214973.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/mojijipototimasone.pdfIn PDF document text
    • http://tainanrup.longi.tw/uploadfiles/files/20210904_012244_9667.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/weseralerakisotobatog.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c59174593c---kikadorolikamuwutirerip.pdfIn PDF document text
    • http://hkbroadwin.com/userfiles/vaxobosiwimowulefex.pdfIn PDF document text
    • http://americasbestwingspa.iorderfoods.com/uploads/files/1412504051.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131e234b1f90---76757734730.pdfIn PDF document text
    • http://underbutter.cz/download/foto/40401527613.pdfIn PDF document text
    • https://haciendaloscipreses.cl/upload/file/gawujimipagibomomiw.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed831d90d4---vaxezevidupufadi.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/4955028678.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/7d75ed3d4fcc0c50c799b865ec6cf8b0/xifim.pdfIn PDF document text
    • http://nhadephoanhao.vn/upload/ckupload/files/kuxidoka.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/werapakabilikosibuzibekor.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16136d08d847a2---xofazejewadanutidebeb.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/zebobimopepipefej.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb6f41414f---67413558402.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/gizivemetetozuvekex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=nova+android+launcherPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF10 18280 bytes
SHA-256: 9350116e809d5d307e7a97c940bc8af74d2ab367b90eb350b3b9616e606b1e38
font_01_sfnt_off0000fdf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF9 10344 bytes
SHA-256: 8b900223fe85a39e6fa111ba48f5cf925d2eea24b4cea7a1ba6e3f8072d1cbd1
font_02_sfnt_off00011534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11534 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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