Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ee3baadc26a2a1…

MALICIOUS

PDF

76.2 KB Created: 2021-09-16 21:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6863312b57987a40085b757373e9a81a SHA-1: 81c1b1347a8d28ee63d9aff2a7956d91d0bad741 SHA-256: 96ee3baadc26a2a1c5c3e085614b373e0aa6e8fece9c79315345c41731674595
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. Heuristics indicate it functions as a link farm, directing users to numerous distinct domains, many of which are hosted on disposable infrastructure. While no scripts were directly extracted, the PDF structure and the nature of the embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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.
  • 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.vpn-solutions.com.pe/ckfinder/userfiles/files/zolatawabitudeb.pdf In PDF document text
    • http://olympicburger1988.com/uploads/files/74134833479.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/29424875218.pdfIn PDF document text
    • https://bodzlomu.com/userfiles/file/38371494337.pdfIn PDF document text
    • https://opescom-store.com/uploads/FCK_files/file/97645976614.pdfIn PDF document text
    • https://baobiachau.com/luutru/files/23025155497.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4621c9b40---46143025420.pdfIn PDF document text
    • https://www.allduniv.ac.in/ckfinder/userfiles/files/fametapeku.pdfIn PDF document text
    • http://ciskmv.com/css/file/nediwuvixanazav.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/26752544399.pdfIn PDF document text
    • http://specialcats.nl/media/files/pinogoje.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/jizonataredika.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/fobesewibokad.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/53522773949.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/zuviligiwozobire.pdfIn PDF document text
    • http://www.kymenhome-etsinta.net/tiedostot/files/pikaroxokemi.pdfIn PDF document text
    • http://gpszone.hu/upload/userfiles/file/2481016690.pdfIn PDF document text
    • http://geobigoni.it/userfiles/files/bafopupo.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/70290572614.pdfIn PDF document text
    • http://lachina.cn/upload/file/kuneduxojomi.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/munukakopa.pdfIn PDF document text
    • https://zhongzing.com/uploads/files/202109161017017448.pdfIn PDF document text
    • http://zawodydrwali.pl/app/webroot/userfiles/file/55268073548.pdfIn PDF document text
    • http://mynotary.ca/sites/all/sites/mynotary.ca/files/71543881618.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/gipamaru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=imo+update+version+2020PDF 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_off0000c99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99C 15768 bytes
SHA-256: 05763029f3946440a030d0d7dc0c508b127b9845ef4de04d0af118b5b087b885
font_01_sfnt_off0000f1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C6 10868 bytes
SHA-256: e4d0362bbd972f225f87d7ad59f74200bf5f24eb0d213c2b9e46efaed52848da
font_02_sfnt_off00010aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1