Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b671a3d649a5d9…

MALICIOUS

PDF

76.8 KB Created: 2021-09-19 07:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 52eaa7a635af24147eed3cb027870fe5 SHA-1: 8dd5e7e18756dc31a2dc347067a33a2884ab76e0 SHA-256: 67b671a3d649a5d9093d0cea058958a9d53fde8ae793abb5a2d6388a3a63368a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a heuristic firing for PDF_SEO_DISPOSABLE_LINK_FARM, indicating it's part of a link farm designed to redirect users. The primary external URI points to a URL that appears to be a phishing lure for 'turbo league apk', suggesting the document's purpose is to trick users into visiting a malicious site. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=turbo+league+apk PDF link annotation
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/758c33911963bf243bd16e230e82f92e/fazepidelipiduraxola.pdfIn PDF document text
    • http://snsi.jp/image/news_file/mosel.pdfIn PDF document text
    • http://tk-weld.com/images/library/File/sutomegoj.pdfIn PDF document text
    • http://hoilhpnqbthanh.com/upload/file/loponovibebanitovoxux.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/83897489764.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/kisepapa.pdfIn PDF document text
    • http://gesundezellen.com/neu/userfiles/file/pikugemixozafijo.pdfIn PDF document text
    • http://hoachattn.com/image/files/navexagajawurakeg.pdfIn PDF document text
    • http://numismatika-nbkpdy.cz/userfiles/file/zuxonavezelutifowabeb.pdfIn PDF document text
    • https://edusfera.pl/upload/file/kafubonigurikenavekizenad.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/sivuzatukebajadavenak.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/zopiruvap.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/finekelasujal.pdfIn PDF document text
    • http://nzozkrowodrza.pl/uploads/editor/file/nibad.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/94800633024.pdfIn PDF document text
    • https://linker.tw/files/ponetalukotemirusopafiviv.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/zaseguvuxe.pdfIn PDF document text
    • http://salonmysliwskirys.pl/userfiles/file/6632237805.pdfIn PDF document text
    • http://galettedesrois.eu/userfiles/file/jasotavujoxo.pdfIn PDF document text
    • https://inprovitchile.com/ckfinder/userfiles/files/zojoje.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/61574238049.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/62004865005.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/49852833816.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/gupemifu.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_off0000c9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EC 17256 bytes
SHA-256: 7f632ac6044bfe06a8bde562d5c9557a269e90dfef384d779b2867d323983061
font_01_sfnt_off0000f69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69D 10260 bytes
SHA-256: 5d92186ddd33b818e5fbc4b125c05f448f6e62dee9a40ca83adf42c7cfb660ff
font_02_sfnt_off00010d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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