Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ee9100c2975689…

MALICIOUS

PDF

79.0 KB Created: 2021-09-20 02:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: eeb5f35e7f8de188bbbf3a6711fc0153 SHA-1: 3021751f4ab7f14c717bc9135b7ead98b7617599 SHA-256: 96ee9100c2975689c64f1435ab75b703224c5d258e9d8fef222372545bf79aab
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, suggesting an attempt to obscure the ultimate destination or evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 5

  • 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.
  • 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://studiofelician.com/userfiles/files/sisifatubipamuv.pdf In PDF document text
    • https://netkat.in/ckfinder/userfiles/files/gemoramewafeka.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/67166706020.pdfIn PDF document text
    • https://milosislandrooms.gr/userfiles/file/kozojidowulal.pdfIn PDF document text
    • http://hongdacable.com/d/files/tenabik.pdfIn PDF document text
    • http://wellgroup.cz/UserFiles/File/53735377672.pdfIn PDF document text
    • https://mitrasuksesku.com/userfiles/file/73684107894.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/179066678612f0c778ed69.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/40999070393.pdfIn PDF document text
    • http://grandioso.asia/editor_upload_image/file/mizomemoselubaguni.pdfIn PDF document text
    • http://yepuco.com/uploads/files/zoxefozunitipidatilo.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/nemazitowopasepivavoz.pdfIn PDF document text
    • http://a-xian-coat.com/uploads/files/202109041105286554.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/mofep.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/lifozesusazanixuzub.pdfIn PDF document text
    • https://rizecanreklam.com/images/file/defoxim.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/27168251478.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161391bda6a597---fapadubosaru.pdfIn PDF document text
    • http://redondoclassicburger.com/uploads/files/58775350147.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161477b4d3fdad---maxaxadaboronak.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/ronapole.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/raruxetujisubugus.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/kebatotupupudazefal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+remove+a+snapchat+filter+from+a+picturePDF 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_off0000ce8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69D 18124 bytes
SHA-256: 957f61ff5949d032db8e56a47c365847fe3a06ab5f3f9dd0871159eb4ac0877f
font_02_sfnt_off00011530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11530 10988 bytes
SHA-256: 9931685318e0a37e75dbb70eaa1291fb6e287ef097c25aba765c412f7e0e8ad0

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