Malicious PDF — malware analysis report

Static analysis result for SHA-256 865272a02018dcd5…

MALICIOUS

PDF

80.7 KB Created: 2021-09-17 23:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7d4c8a688e2e55cc23cc205a2475cd90 SHA-1: 871906f6b6867357ef7975540ec83ef207edb50f SHA-256: 865272a02018dcd5bab30b2b0c0becc771e0ddd808f8d47cb0eedf7da40c8ecd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers flagged it as malicious. It contains embedded JavaScript and numerous external URIs, many of which point to disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded JavaScript indicates an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://diamantina-joaillerie.com/ckfinder/userfiles/files/wewemuxodanofirur.pdf In PDF document text
    • https://techlan.pl/files/file/liwonunatariz.pdfIn PDF document text
    • http://franceplus.fr/userfiles/file/78013680628.pdfIn PDF document text
    • http://cukrarska-vyroba.cz/UserFiles/File/57084552469.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/86287300825.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/todevipu.pdfIn PDF document text
    • http://insureavisitor.com/userfiles/file/9720501230.pdfIn PDF document text
    • http://juditphotography.com/picture/userfiles/file/wupoliwixexexajalepuzepo.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/90950308511.pdfIn PDF document text
    • http://meubelenindex.nl/images/uploads/bimobisenebipozutupebubu.pdfIn PDF document text
    • http://svx.su/ffile/file/15139070298.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/68117019326.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/nuwowupada.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/28884930886.pdfIn PDF document text
    • https://ventsistem-bg.com/userfiles/file/30078013957.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/91459440350.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139eb755f84e---92896926910.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/rozezutenatigak.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/rifineluxepazuno.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/betoje.pdfIn PDF document text
    • https://sinarwaja.com/account/files/bokumugewivudidosedalobik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+enable+qr+codes+on+androidPDF 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_off0000d6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DF 17652 bytes
SHA-256: 8473036c0dd90703695c88f02722ec7f75ed62469938edb77647e4c6ac9bcaa8
font_01_sfnt_off000104ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AB 10724 bytes
SHA-256: 024d1174a1b92827242d667014779fb02ddf681060457cc89713dd0a35aef091
font_02_sfnt_off00011d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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