Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22d21f89ab4a65a…

MALICIOUS

PDF

88.0 KB Created: 2021-09-10 04:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 72898689537f082831c0199a21e913a1 SHA-1: c63a4be8a32604e4420803e8004e757e41110682 SHA-256: b22d21f89ab4a65ab03a52146f16c83a07d0a213d61f3e062ba2de7bd7f82f73
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable or unknown hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.karelo.com/uploads/File/18099571790.pdf In PDF document text
    • http://www.taxivanclass.com/uploads/ckfinder/files/50495088253.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/42069535675.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/18971009027.pdfIn PDF document text
    • http://schokozentrale.de/idata/86990238817.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/folofodenu.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613756b827d1f---votafilapori.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/xagafubot.pdfIn PDF document text
    • https://ou-ravda.com/ckfinder/userfiles/files/zekamazetediredu.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/buxujotudigolokim.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/77547470988.pdfIn PDF document text
    • https://granitabrasive.ro/editor_up/58608299964.pdfIn PDF document text
    • http://fkhd.cz/data/img/jozomiloxivalewulamelo.pdfIn PDF document text
    • https://nezamirekhaseafoods.com/userfiles/file/55655114490.pdfIn PDF document text
    • http://laptopcuhaiphong.vn/upload/files/46705650271.pdfIn PDF document text
    • http://belly.bpv.su/content/files/files/49772951958.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/tb3o20guenqut6qfmialqh4rr3/99842484717.pdfIn PDF document text
    • http://medwin.kr/userData/board/file/pewifafapeliri.pdfIn PDF document text
    • https://marblobathware.ph/app/webroot/img/files/66933747453.pdfIn PDF document text
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/wovavejoliliduro.pdfIn PDF document text
    • https://www.bnbtravels.com/ckfinder/userfiles/files/rukibuvofesototorosakele.pdfIn PDF document text
    • http://namlinhchivietnam.net/userfiles/image/file/teges.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=android+phone+photo+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C6 10388 bytes
SHA-256: 07904d32b725b479b9b8f357218cfba60df93513dca9e63fc8635e39e98ce3f2
font_02_sfnt_off00012139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12139 18776 bytes
SHA-256: e6ff4894fac584a2e8f76cc72694a691506fe720ddba5e57ff30dc66e465bc2b

Open this report in the interactive analyzer, or submit your own file for analysis.