Malicious PDF — malware analysis report

Static analysis result for SHA-256 e000ba9acae6c8a0…

MALICIOUS

PDF

79.5 KB Created: 2021-09-18 10:09:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: baf31cbe317d83371fe56f4da52b61cb SHA-1: 3418f6dbc35b472b302f209f92cc5df4a5b091e0 SHA-256: e000ba9acae6c8a0ff5322e0e6ab554d963aed78123140240210beb86eb14546
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as a phishing trojan by ClamAV and flagged by an ML classifier. Heuristics indicate it functions as a link farm and a callback phishing lure, directing users to external URLs. Although no scripts were explicitly extracted, the PDF structure and external links suggest an attempt to redirect users to malicious content or initiate a phishing interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ketchas.ru/uplcv?utm_term=vfr+france+android PDF link annotation
    • http://geerhannutpourreussir.be/docs/upload/files/podusulevunanuj.pdfIn PDF document text
    • https://www.corpeverest.com/ckfinder/userfiles/files/91424669714.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/labukojewitofasake.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf139b6a2e---43944027324.pdfIn PDF document text
    • http://ms-krmelin.cz/app/webroot/files/files/kiwikiwowebusezo.pdfIn PDF document text
    • http://canissapiens.com/images/uploads/file/sepojataler.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/49136918052.pdfIn PDF document text
    • http://altinay-law.com/images/file/17785074208.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/rokubinad.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/tivipigupekixibovifipi.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/zidabajafijajurixutiw.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/wewemuxodanofirur.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/notomupanadi.pdfIn PDF document text
    • http://korea-seals.com/ckfinder/userfiles/files/fojopufadus.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/72371398280.pdfIn PDF document text
    • http://synergienetwork.net/userfiles/file/16201280599.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/nesufowolafabezukom.pdfIn PDF document text
    • https://neksav.com/upload/ckfinder/files/34062831441.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/73648837796.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/belugofofenokodadopoketuj.pdfIn PDF document text
    • https://rimi.sk/userfiles/file/zerafadepabovado.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ece8e4b50---gojulenojinemeziton.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/1201607262.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/pevazom.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_off0000d16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE986 10128 bytes
SHA-256: 0b903b95461686bf211156d7a32ecfd2838342d19b4613410b33996813b54f6a
font_02_sfnt_off00010037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10037 18052 bytes
SHA-256: 43ea8fbb32f248e780d80bb385066855888af4f31d347e12d389e816c1a9c47d