Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6d263b75e0aea5…

MALICIOUS

PDF

84.2 KB Created: 2021-09-01 13:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 08d990baca74c05bbd13a5994069e737 SHA-1: 73eb5bf61aa455866b69ef9dc7c64959f40650b3 SHA-256: 6d6d263b75e0aea54bd00750f6a2ed4ccfc722cb447c22c6a31fd8d984fe955b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ytovietnam.net/ckfinder/userfiles/files/4796483371.pdf In PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/dti2dqa4gcb1a7lrj8gkhtdkap/10313456269.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/77744032904.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/b46ded054418051d58c0abf6e7f750af/29660727536.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e93128247ec---jegixatilomodakabevavor.pdfIn PDF document text
    • http://lakesnwoodskerala.com/uploads/file/41786113139.pdfIn PDF document text
    • https://foulardfotografando.it/file/79959108435.pdfIn PDF document text
    • https://people11people.gr/uploads/File/78394402969.pdfIn PDF document text
    • http://geotersrl.it/file/vibugapozivojizero.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/14200788784.pdfIn PDF document text
    • https://mpksieradz.pl/upload/file/lepefidawapozakojad.pdfIn PDF document text
    • https://www.shinoda-usa.com/ckfinder/userfiles/files/xudodigawemakajudolob.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dcdaa12c4---lurezuruzas.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/berinijuvog.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f342c5f0c---6561013764.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/21100829514.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/48580631511.pdfIn PDF document text
    • https://medpressa.ru/files/file/putalevog.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081e9cd21684---85166495875.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa25f75bdf8---doxenezarapule.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/zonimasurewipumotiso.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/darab.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/tejitejunewubutufapafitej.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///nijikakazimijepifefego.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=joint+venture+protective+carbinePDF 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_off0000e38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38E 10448 bytes
SHA-256: a4e5266997ca66b4bbaafeae1f5e47c0390fee08b929d2906c2bbd2d83559534
font_01_sfnt_off0000fb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB30 17944 bytes
SHA-256: f5945e55b8a6678c2fc97a3a938d27e20485bb4d6093b0e92e03a50b987d03a7
font_02_sfnt_off000129f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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