Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff7e6009ab1dc24c…

MALICIOUS

PDF

74.0 KB Created: 2021-09-25 00:25:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6e4ac257df4232e71ab178dd6b104af7 SHA-1: cc8451b878081695b8729ff846be43daca12c2ef SHA-256: ff7e6009ab1dc24c12270f9ee348d038197e817171093dce449fd146f06ef20f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting, likely intended to redirect users to malicious sites. The presence of external URIs and the overall structure suggest an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://huntic.ru/uplcv?utm_term=bus+simulator+ultimate+download PDF link annotation
    • http://geredekombiservisi.com/userfiles/file/punadaf.pdfIn PDF document text
    • http://dezis.ru/uploads/files/61168232800.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/83572101805.pdfIn PDF document text
    • https://bunexim.dascalita.ro/app/webroot/files/userfiles/files/pereribiresopalawilodop.pdfIn PDF document text
    • http://archgeo-leszno.pl/uploads/userfiles/files/fafilosupejavananopu.pdfIn PDF document text
    • https://mystruggle.uk/indigo/ckfinder/userfiles/files/11640107566.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/25947799433.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/vuxaxixalesalepor.pdfIn PDF document text
    • https://sandipkumardutta.com/ckfinder/userfiles/files/guposirodefika.pdfIn PDF document text
    • http://crystaltrade.hu/data/file/wapegedotirigabibitejog.pdfIn PDF document text
    • https://tapuionoticias.com/ckfinder/files/19936010680.pdfIn PDF document text
    • http://gevenschoenen.nl/ckfinder/userfiles/files/puraxaborulevaxakexevig.pdfIn PDF document text
    • https://gabconstruction.com/ckfinder/userfiles/files/mewinilurelokalisutopaden.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210920154929_ffow7t.pdfIn PDF document text
    • http://fese.in/ienupdimages/images/files/59508510037.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/fukanosiboputavuje.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/gilisotugamija.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/16078848677.pdfIn PDF document text
    • http://tl-maskinfabrik.dk/userfiles/file/sozizuxosifaxoxe.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/ximekuwu.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/hc3g1t734qlg27fob4c8v4oign/63075432295.pdfIn PDF document text
    • https://prcomponents.com/ckfinder/userfiles/files/lurig.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/17269280422.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/tuwozasafe.pdfIn PDF document text
    • https://quimicasorocolor.com.ve/ckfinder/userfiles/files/zakozifapazoxal.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613af8389f1e9---1577456198.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_off0000baf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF0 18040 bytes
SHA-256: de3908ac017ca1fa37ff88ecac902a77c954cd3455e6d566cd5f40a103e05bbd
font_01_sfnt_off0000e951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE951 10648 bytes
SHA-256: 34379ed02cda67de8165bed4dd1e01a393960b9bc6c2ca41007e43612751325c
font_02_sfnt_off000101cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1