Malicious PDF — malware analysis report

Static analysis result for SHA-256 97a2088b60303bec…

MALICIOUS

PDF

89.1 KB Created: 2021-09-09 08:10:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3e13fe63e820b57779e76ef11f3c121a SHA-1: feb19cf994c4e731fc32c1e48f04378939a3d897 SHA-256: 97a2088b60303beccfd9ccbe5491e06ce03f9d59184850f20efcb7d2b537744d
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is designed to trick users into handling a password-protected archive, a common tactic for evading security scans. Embedded JavaScript and numerous external URLs, many pointing to PDF files, further support the analysis of a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://termoformat.md/img/files/9444130160.pdf In PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/dazaguzuz.pdfIn PDF document text
    • https://www.domaine-de-la-ferme.fr/ckfinder/userfiles/files/28226336784.pdfIn PDF document text
    • https://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/aa4f8e9afdf3f65f744f2ada41192045.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/71546488263.pdfIn PDF document text
    • http://gldbirdgel.com/user_img/files/1037249321.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/batapidisaje.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/38884022495.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/161360a7339afa---josanukuzowobud.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/21986377248.pdfIn PDF document text
    • http://nagyberki.hu/sites/default/files/fck_uploads/file/17902923910.pdfIn PDF document text
    • http://krr-nfe.com/suratnfe/UserFiles/File/dozatololaliwodunizusu.pdfIn PDF document text
    • https://ietc-oman.saktoon.com/userfiles/files/43142373110.pdfIn PDF document text
    • http://gojjang.com/uploads/files/gulufapoxot.pdfIn PDF document text
    • http://inercial.es/uploads/files/zibazupinir.pdfIn PDF document text
    • http://stapper.de/sites/default/files/userfilesfile/65312872461.pdfIn PDF document text
    • http://prime42.ru/userfiles/files/35825791224.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20210907_B111DE73273A3C12.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/palowibagiwimu.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161395f86303a6---52500181425.pdfIn PDF document text
    • http://evaemlak.com/userfiles/file///gemepunotodesaraw.pdfIn PDF document text
    • https://proxus.nl/file/vezajazutexariki.pdfIn PDF document text
    • http://gimnazjum-krasiczyn.pl/img/userfiles/file/ditafatinotugefegigem.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/nobiwabakesivifivo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=android+ger%C3%A4te+manager+handy+entsperrenPDF 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_off0000f0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FC 19572 bytes
SHA-256: cf652444080be74874492018b285cd9a88603219477d3f4dcb75a904a15b831e
font_01_sfnt_off00012305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12305 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B1C 11144 bytes
SHA-256: 090ab5a689c7fd062f74c8adb9d88b68dd408a977bfce9319d6f236665267b25