Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e29a1b1dd32d62…

MALICIOUS

PDF

99.1 KB Created: 2021-09-16 11:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 568585127a756ce84fbc3dce809edde6 SHA-1: 71bb7d9a49421f3c33ce7d520245d2aa29633533 SHA-256: 06e29a1b1dd32d624c1769e4db999c42b90042434c9af7325be2284548fa7454
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. The document body is unreadable, but the heuristics and URLs point to a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jorkurojus.com/userfiles/file/76862871747.pdf In PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/4000926935.pdfIn PDF document text
    • https://scalping.ir/data/files/file/54690691049.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/nabazid.pdfIn PDF document text
    • http://marjoleintje.nl/include/userfiles/68408938625.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/faxuvupugosogojiteled.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/fegukodozajel.pdfIn PDF document text
    • http://owop.challengersports.com/ckfinder/userfiles/files/dugotigatopudabarunodow.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/84382495068.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/tugigov.pdfIn PDF document text
    • http://leadingedgecorporate.com/user_images/file/rexomenakug.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/12373900770.pdfIn PDF document text
    • http://namlinhchivietnam.net/userfiles/image/file/tonemodidavovubujor.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/48500956648.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/sozonawawe.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161359837366b2---99835802078.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/82445463809.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/mgjpq15l4912372446af207if5/soviwojipupiwomujaforobo.pdfIn PDF document text
    • http://bftt.marketsearching.com/upload/files/kakoxuxojavuvix.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/32559208515.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/regixowuvojupubarotizifaz.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/kuvubudubumabe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=robert+kiyosaki+wrote+rich+dad%27s+guide+to+investing+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_off00011a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A30 11532 bytes
SHA-256: 8be66264d0ccc9ce297ad6093f4e65cf195dae943dcce0ab2f51608860644fed
font_01_sfnt_off00013541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13541 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D53 18880 bytes
SHA-256: 4c86527ff081c9867d539bc8d78207d1bba5e8f49e225f2c26504ae974082895