Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b7d3bdcc71c3fc3…

MALICIOUS

PDF

72.4 KB Created: 2021-09-26 20:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 703bca4dc209adeebfa17f467872b81a SHA-1: 6970fb6cf620656aa05024e33799bf6e7beee46a SHA-256: 8b7d3bdcc71c3fc3d21c894d8b8cb581581ccf9578f4ddb68debd69de04becbd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malicious content distribution attempt. The presence of a specific URL suggesting a 'download soccer bet apk' further supports the lure-based attack pattern. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/uplcv?utm_term=download+soccer+bet+apk PDF link annotation
    • http://form4concrete.ru/pics/cont/file/58189517981.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/nizafezi.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/cfb2c2172356ac73c0187041c1bac29e/kimakigurudiva.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/lanujepufisosijepix.pdfIn PDF document text
    • http://wingmanplanningdemo.com/userfiles/files/rumegedamedunekutak.pdfIn PDF document text
    • http://sarafis.pl/img/userfiles/file/19893298865.pdfIn PDF document text
    • https://phr4u.com/files/31873280734.pdfIn PDF document text
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/74927751679.pdfIn PDF document text
    • https://diphong.com/uploads/zuberexapetel.pdfIn PDF document text
    • http://encino.ilovepokebar.com/uploads/files/dofokowonab.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/63371987818.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/33814223572.pdfIn PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/liruna.pdfIn PDF document text
    • http://aeklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40518676884.pdfIn PDF document text
    • https://sofupingame.net/calisma2/files/uploads/81050643218.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16143ca76567f5---kabozonoxijixazivutijupon.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/modarevefakafakizok.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/7692574568.pdfIn PDF document text
    • http://northcity.rs/slike/files/80191341416.pdfIn PDF document text
    • https://gitteszoneklinik.dk/ckfinder/userfiles/files/xovojolalijo.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/ledarovatewenageja.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/lamikedulokalowubaza.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_off0000b2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000caea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAEA 18544 bytes
SHA-256: c8eb44fa1e38f598df0950919a47843b699fac361489b9ec9a72e224d22f80db
font_02_sfnt_off0000fb23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB23 10732 bytes
SHA-256: c3c80bc34ff7de7a394a13eb851152c8ce85336021ed33c7c756593039ae5f74

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