Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f4bcd700e2da014…

MALICIOUS

PDF

84.3 KB Created: 2021-09-16 23:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 95bf3b37bccfbc51eee61a6a5101950d SHA-1: b8e41de54bab6c7b732b18e9e156f34bcda1d435 SHA-256: 6f4bcd700e2da0144022cbc7f58fad8f883553b53835a0d9acb2b74adc2b09dd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to domains that appear to be part of a link farm, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=testflight+android+apk PDF link annotation
    • http://toyotarent.hk/FileData/ckfinder/files/20210904_3E5D62DD9F4FF8D2.pdfIn PDF document text
    • https://totalmediasolutions.ae/ckfinder/userfiles/files/24679834253.pdfIn PDF document text
    • https://mimpishio2bet.net/contents/files/jijirotobanikuji.pdfIn PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/xifikasisejijex.pdfIn PDF document text
    • http://newgoodluckcrane.com/admin/uploadfiles/file/32533981870.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/18582780768.pdfIn PDF document text
    • http://marisqueandopremios.com/campannas/file/41729977496.pdfIn PDF document text
    • https://nobelboya.com/userfiles/file/kilatifuli.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/kijikirobosodibazeji.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/nosapanedutubiropedu.pdfIn PDF document text
    • http://flyingkirin.com/uploadfiles/file/151923218928.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/91224061127.pdfIn PDF document text
    • https://divetechmarine.com/contents/files/towaf.pdfIn PDF document text
    • http://hvezda-pardubice.cz/files/file/47042666529.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/kowowexujikulejo.pdfIn PDF document text
    • https://tranhtreo.com/images/ckeditor/files/45265508185.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/dubafetul.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7b17baeb2---kenesoxotalujazipuza.pdfIn PDF document text
    • http://websteravelandscaping.com/editorData/file/2548177371.pdfIn PDF document text
    • http://verzorgingsindex.nl/images/uploads/jiferajenepoxilusez.pdfIn PDF document text
    • https://techielingo.com/fck_uploads/files/tusobaxave.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613df6fb28c1b---lenagisujubalakisaz.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/86525517748.pdfIn PDF document text
    • http://jts-electrical.co.uk/ckfinder/userfiles/files/58366316785.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_off0000dfb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB2 10832 bytes
SHA-256: c352daa36cdd4a5fd7331baacaa3fff1e85ee50bbc9de390e83ea18887ae9ae3
font_01_sfnt_off0000f869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF869 19560 bytes
SHA-256: 77c6ec364a75de9ec0d85d8cf28112b906c7153566ab41caacdec235a3ac6eaa
font_02_sfnt_off00012b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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