Malicious PDF — malware analysis report

Static analysis result for SHA-256 959c5632f616f2b1…

MALICIOUS

PDF

69.3 KB Created: 2021-09-24 15:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 088a63942dbd62e01f333d178fea297c SHA-1: 674392c74bb2412d6f4129917e3f60b8eff205d4 SHA-256: 959c5632f616f2b1f3fa2743354b4be240cf7f27cec5df156d18322b989424c9
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links, many pointing to disposable domains, which is characteristic of phishing or malware distribution. The heuristic 'PDF_RANDOM_URL_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest a malicious intent to redirect users to further malicious content. The embedded JavaScript likely facilitates the exploitation or download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://inprovitecuador.com/ckfinder/userfiles/files/jonisolofixunolizazazisig.pdf In PDF document text
    • https://marblobath.com/app/webroot/img/files/vopibiwoxojukaloru.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/jazuxinalomabodel.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/sitidugu.pdfIn PDF document text
    • http://holland-ex.com/images/blog/file/pomol.pdfIn PDF document text
    • http://ave-france.com/pics/files/nexiwitime.pdfIn PDF document text
    • https://osiindia.org/ckfinder/userfiles/files/5508783950.pdfIn PDF document text
    • https://ngenadmin2.nextgenphotosolutions-beta.com/app/webroot/files/file/vobefiz.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/53185328618.pdfIn PDF document text
    • http://studiomedicoveterinariobellucci.eu/userfiles/files/16412290972.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/sojoritisekedolix.pdfIn PDF document text
    • http://novichiha.ru/pic/file/50502002687.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/78627636572.pdfIn PDF document text
    • http://stylowa-pss.pl/userfiles/file/tewukizazoti.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b12ab73ed5---78386048417.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210924125023.pdfIn PDF document text
    • http://headrepublic.pl/images/files/zesebozagawagopujiva.pdfIn PDF document text
    • https://wojczak.pl/userfiles/file/jijumefidebitizevinilut.pdfIn PDF document text
    • http://harnettcountyhba.com/userfiles/file/23632801456.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/lewesufutesusikub.pdfIn PDF document text
    • http://noithatsah.com/webroot/img/files/38143463520.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/71073036375.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/8adegjj71k0l88pjbutpgtd1te/vewanadapobukimes.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/pewuvuvi.pdfIn PDF document text
    • http://www2.grupoksl.com.br/js/ckfinder/userfiles/files/71838333274.pdfIn PDF document text
    • https://nocrime.cntwn.org/ckfinder/userfiles/files/47995870188.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=creare+musica+con+androidPDF 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_off0000b3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD7 14480 bytes
SHA-256: 63b16b2009c7ecae72f3a0d2ccbceaf0f219e10b2f8fcb9dcbdd6d7cab151a3d
font_02_sfnt_off0000efb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB7 10520 bytes
SHA-256: 9a7a02e08fc94ba993a8a4f3f9c46849a7fece4eaa6b47a07094a111dbb067ff

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