Malicious PDF — malware analysis report

Static analysis result for SHA-256 767d6b1c87eb391b…

MALICIOUS

PDF

74.2 KB Created: 2021-09-09 03:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 515ae8dacafb2a19e494f30861a7e4c4 SHA-1: 2f44ec138dd109781e0d3f721e170f0c9ecce7cb SHA-256: 767d6b1c87eb391b6ce5485984e5a56fa4a4dc3f884f63628e610df47c396d5c
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://krisoc.ru/uplcv?utm_term=how+to+get+the+harry+potter+movies+for+free PDF link annotation
    • http://topp.pl/_topp/file/28489318066.pdfIn PDF document text
    • http://seritour.com/rsm/files/nikejizarapejupiv.pdfIn PDF document text
    • https://www.temtechnologies.fr/ckfinder/userfiles/files/medite.pdfIn PDF document text
    • http://brilsports.ro/userfiles/file///gugexoruzekajoj.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/3411991071.pdfIn PDF document text
    • http://unseretochter.ch/images/file/34124386608.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/68063847778.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/64474278102.pdfIn PDF document text
    • http://revucue.com/ckfinder/userfiles/files/nevawojoluniguj.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/muvizagudisunakuxabowe.pdfIn PDF document text
    • http://envigest.cz/upload/file/99603997165.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/23320583952.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/viwekidage.pdfIn PDF document text
    • http://icaalliance.org/filespath/files/20210904101914.pdfIn PDF document text
    • https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/vibafutakixanan.pdfIn PDF document text
    • https://learnrkb.jugalbandiresearch.com/ckfinder/userfiles/files/dukuwepolagab.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/9359793693.pdfIn PDF document text
    • https://thebookonpersonaltransformation.com/FCKeditor/file/27184212211.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021090907175373499.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/lidigarimijup.pdfIn PDF document text
    • https://remini.hu/userfiles/file/77021697521.pdfIn PDF document text
    • http://naoshima-tours.com/images/blog/file/rivopobomutebu.pdfIn PDF document text
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/31436922765.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC53 17568 bytes
SHA-256: bed1963b17c549177c243fa8e38d501ef0e95fc3a692e8abee927272b7b82010
font_01_sfnt_off0000e9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F6 10912 bytes
SHA-256: 45b6e445f6432a60f9d3a3eb2092c7444d7f70959a6909e46b3057611a2f7b8d
font_02_sfnt_off00010357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10357 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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