Malicious PDF — malware analysis report

Static analysis result for SHA-256 268edae2d4fbc75e…

MALICIOUS

PDF

92.5 KB Created: 2021-09-12 08:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 46b502681311a0f2f034f9275fbc0e1c SHA-1: f08798e36411d0d8315444db9f481d2961b22067 SHA-256: 268edae2d4fbc75e63af2c58d6bf2f60c19db8dc616de29a29d3fcaf3b0de19f
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a QR-code lure. 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 0.9905

Heuristics 6

  • 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.
  • 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
  • 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://penzionriverside.cz/files/file/48857788630.pdf In PDF document text
    • http://zsmnowakowski.pl/userfiles/file/tafos.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/20395709211.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/bobulowonidavuve.pdfIn PDF document text
    • http://ke-sen.com/userfiles/file/1630948132.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/57400632135.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/1538501138.pdfIn PDF document text
    • https://billionbosses.com/ckfinder/userfiles/files/78860415226.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/7165152737.pdfIn PDF document text
    • http://terezszilvia.com/images/uploaded/file/zawevanesakavuzelajusigad.pdfIn PDF document text
    • http://hzbmsj.com/images/upload/File/lexumujupixujoragifebe.pdfIn PDF document text
    • https://eurosan.pl/user_images/file/jijivonajikisi.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f9109af7f.pdfIn PDF document text
    • https://agrocare.ro/ckfinder/userfiles/files/gojatudodesisewabawi.pdfIn PDF document text
    • http://vlajkylevne.cz/UserFiles/File/xilisixijavis.pdfIn PDF document text
    • http://laconchigliacasevacanze.it/userfiles/files/ragezofepoxevapa.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/35375977386.pdfIn PDF document text
    • https://yar-net.ru/userfiles/file/xofapip.pdfIn PDF document text
    • http://mobiliteit.nu/files/3783182216.pdfIn PDF document text
    • https://europartner2.pl/uploads/88447152164.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/23765739658.pdfIn PDF document text
    • http://euro-ex.com/images/blog/file/jivexujinuno.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f13b762f7---91703189677.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/77826902650.pdfIn PDF document text
    • http://shesob.com/file/files/51062720261.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/97261328542.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=one+two+three+full+movie+onlinePDF 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_off000107cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE1 17228 bytes
SHA-256: 804207123657c39745c831cb1c2050c0db3340ee2d2b1d2b3804e69c493e5e8e
font_02_sfnt_off00014c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C8A 10428 bytes
SHA-256: 2d6efeb77fad00b441d3ac90e8d9c6b2b7ced46bd9a160b0eeb924c17a119fe3