Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eeb67523c053c73…

MALICIOUS

PDF

83.8 KB Created: 2021-09-18 12:18:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5488771217229c18bb3008df63d31908 SHA-1: 602349bde9c1e1efb17749bd2dcc02a50a47a1d0 SHA-256: 9eeb67523c053c73d7b6a6a16b70767bfd7101c5a2bccfe5e6b66b319caffdf1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many of which point to unknown domains, suggesting a link farm or redirection mechanism. The PDF structure and heuristic firings indicate it's designed to lead users to external content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://ets-sptk.ru/pic/file/10097081853.pdf In PDF document text
    • http://tfh-filter.hu/_user/file/komirodozelijosikaxod.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/46869186800.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/munaje.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/46730856645.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/23647920613.pdfIn PDF document text
    • http://identik.hu/editor_up/biluwamav.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/87720318695.pdfIn PDF document text
    • https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/45123130445.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e86d9d4eb4---pabewezegizepuv.pdfIn PDF document text
    • http://flyingfish-stay.com/userfiles/file/33404940340.pdfIn PDF document text
    • http://alltimescare.com/attachment/files/82024982063.pdfIn PDF document text
    • https://expomediainc.com/upload/file/21119873213.pdfIn PDF document text
    • https://gkia.org/kingkong/userfiles/files/piver.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/seraxav.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/75424311249.pdfIn PDF document text
    • https://vvpta-irvine.org/userfiles/file/10057575090.pdfIn PDF document text
    • http://ahjygjg.com/upload_fck/file/2021-9-4/20210904213341378420.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/f5156ecb2723ded211483c05f0fe49bd/29981400092.pdfIn PDF document text
    • http://wsmr.us/userfiles/file/pezewu.pdfIn PDF document text
    • http://glampingcaravan.com/userfiles/file/20210916192239.pdfIn PDF document text
    • https://promoform.coreform.it/uploads/file/90995961739.pdfIn PDF document text
    • https://karpzbeldowa.pl/uploads/userfiles/files/japoder.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/latiwuxutumejovufutitam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=arms+and+the+man+summary+pdfPDF 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_off0000e4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0A 17496 bytes
SHA-256: dee6924fe32382a3e09dae296722034ae7b12a53f8e59512714423253c4510a2
font_02_sfnt_off00012979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12979 10700 bytes
SHA-256: 0c568dc299e3a57ec632f1b77298d17e5ee65d9a9169b726d17f391b94593817

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