Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59e4510ccbe963b…

MALICIOUS

PDF

74.5 KB Created: 2021-09-12 02:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: eb55064216208156c4444f9589d8ce43 SHA-1: 62e6587122ab3d2b3a9bb834bf1532b1582532b6 SHA-256: f59e4510ccbe963bf97dbc660a9457c2977221dbf4d3a6493a8c7038ca879515
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and is flagged as malicious by ML classifiers and ClamAV. It also exhibits characteristics of a link farm, with numerous links pointing to disposable hosting, suggesting an attempt to distribute malware or phish for information. The presence of embedded JavaScript indicates an attempt to execute malicious code within the document, likely to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://carshopm.com/js/upload/files/95195401477.pdf In PDF document text
    • https://resulgame.com/calisma2/files/uploads/kasubax.pdfIn PDF document text
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/vuzalesubotulonodepukatin.pdfIn PDF document text
    • http://jrecchina.com/ckeditor/ckfinder/userfiles/files/25230738848.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/f2aa82ju1m6fvhrdm4svdkodp9/87581657535.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/60291069064.pdfIn PDF document text
    • http://pro-roubenky.cz/UserFiles/File/todajusulalafirisemukumus.pdfIn PDF document text
    • https://laznia-radom.pl/userfiles/file/kivamaxelisovut.pdfIn PDF document text
    • https://literie-depot.fr/UserFiles/file/37983677237.pdfIn PDF document text
    • http://liweisteel.co.th/ckfinder/userfiles/files/diluliwuzal.pdfIn PDF document text
    • http://rayhovietnam.vn/upload/files/jewebarixozakozaluwafi.pdfIn PDF document text
    • https://fundoohairstyles.com/hairstyler/images/file/finiv.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/sonanibulewiwivavelopozak.pdfIn PDF document text
    • http://otworz-biuro-podrozy.pl/userfiles/file/75305117592.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210903_127C7F95AC1C0AC4.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/420b4f9c2876dc223fb69438ae5a8293/kasawilo.pdfIn PDF document text
    • http://vakaruinzinerija.lt/userfiles/file/vijikuworuvetufupunosu.pdfIn PDF document text
    • http://natpuedu.in/userfiles/file/15620932564.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/momosekit.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/73176618015.pdfIn PDF document text
    • https://promptcorporate.com/ckeditor/ckfinder/userfiles/files/88458792161.pdfIn PDF document text
    • https://afmiletisim.com/resimler/files/bunepesametesevu.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/gedexepemasaxifilo.pdfIn PDF document text
    • http://xn----8sbfhu6ab4bqv.xn--p1ai/userfiles/file/joxopanojebisafenu.pdfIn PDF document text
    • http://cukrarnakolbaba.eu/obrazky/files/40703006874.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=vidmate+mod+apk+old+versionPDF 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_off0000b920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB920 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD137 10680 bytes
SHA-256: 9ffb6fa3542eb468f0e969f65b0c20c7f3ccf04560228ea631a830ee12d0516a
font_02_sfnt_off0000e9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AE 19080 bytes
SHA-256: b5680dfa19b9aec7eed1011f1836dff842fd6727a9a6baa6ee9895330c16d18a