Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bd9bb1dd0bc246e…

MALICIOUS

PDF

71.2 KB Created: 2021-10-01 09:49:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 34da0498c16d6796324bdae8f77f8eb0 SHA-1: a826d78c66841a5d53848942c3e497b12ddc77ce SHA-256: 8bd9bb1dd0bc246e17a7066bc65f13d753359afd956627c4f9de082c804773f9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution campaign. The PDF's structure and embedded links indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://pixomot.ru/uplcv?utm_term=finding+dory+full+movie+in+tamil PDF link annotation
    • https://yarpaket.ru/userfiles/file/kusolamigogif.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/bubukiwatuso.pdfIn PDF document text
    • http://opusbiz.kr/data/editor/file/19268889786133b18d45aef.pdfIn PDF document text
    • http://fuli-capital.com/userfiles/file/dizomapowodedimusibaje.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/44152795731.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/35085695800.pdfIn PDF document text
    • https://zevkotodoseme.com/upload/ckfinder/files/wuwofelojejitefixevek.pdfIn PDF document text
    • http://polins.org/public/userfiles/file/90765927612.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/26074049921.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/zukadoseleju.pdfIn PDF document text
    • https://textmakareknutsson.se/upload/image/63796340946.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/rozugapikobetafubavoselew.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/xajexutatog.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/80646317634.pdfIn PDF document text
    • http://gjbbang.com/userData/board/file/8634324935.pdfIn PDF document text
    • http://palmdale.thepokeluau.com/uploads/files/gebuladukutexiwegezar.pdfIn PDF document text
    • http://dvif.fr/userfiles/file/rupem.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/laxafazemubes.pdfIn PDF document text
    • http://calisnt.com/uploads/files/27261017048.pdfIn PDF document text
    • https://h016s5or78-du3.com/contents/files/58532362593.pdfIn PDF document text
    • https://lmbri.com/WYSIWYGImage/file/nelodakazogegetagajazaz.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/miwexikigabik.pdfIn PDF document text
    • https://birudongker.com/contents/files/16968862726.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/13835946817.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/5a283c3c23eb80aea78a50bdff2fa2e1/89643046969.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_off0000b178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB178 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC98F 10788 bytes
SHA-256: 903f6dc3335438e66a35e24a833f8c6fbb659bfd954f3fe547ed3dd4c7a55bb7
font_02_sfnt_off0000e22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22C 17288 bytes
SHA-256: dbb2ae863756d76e5b792fce44db9846c6162ee64ddff85531966acda9a60e4c

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