Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c9ed24dd34abe5…

MALICIOUS

PDF

77.7 KB Created: 2021-09-11 03:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 3087c5c161f11904a5e555398f1fae34 SHA-1: 755ed3630f8d3821a17126257c84bbedfa113c2a SHA-256: 06c9ed24dd34abe551a452f373231846a0184b522c84c3b43c4dd17cd1371e8b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous external URIs, including one pointing to crysiq.ru, suggesting it's part of a phishing or malware distribution campaign. The PDF structure and embedded links are consistent with a spearphishing attachment used to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://crysiq.ru/uplcv?utm_term=top+gun+1986+putlocker PDF link annotation
    • http://123podkrovie.sk/editor_uploads/files/75136555596.pdfIn PDF document text
    • https://brtim.com/uploads/wysiwyg/files/89723806707.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/tivimokidinuzadukuletisim.pdfIn PDF document text
    • https://prestinieurope.com/userfiles/files/27933923918.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/13572295333.pdfIn PDF document text
    • https://www.eos.org.eg/ckfinder/userfiles/files/veluvito.pdfIn PDF document text
    • http://zhouzhuank.com/v15/Upload/file/2021910826366520.pdfIn PDF document text
    • https://egyediajandekotletek.hu/mvc/userfiles/file/rixomabaponezevezuxu.pdfIn PDF document text
    • https://keluargamimpi.com/contents/files/sabagebimabeviri.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613338fc34b15---wopawirovosudirukuwi.pdfIn PDF document text
    • http://eurekaelearning.com/upload/news/file/12603217300.pdfIn PDF document text
    • http://drumlockingclamp.com/FCK_Editor_Images/files/92889808684.pdfIn PDF document text
    • http://pietrek.com/MARCUS/files/file/57970241317.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/34870377980.pdfIn PDF document text
    • http://okudshava.ru/userfiles/file/29410082327.pdfIn PDF document text
    • http://gwtcs.org/Content/uploads/files/tojisujes.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/80902907574.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/rimelumivumoka.pdfIn PDF document text
    • http://essentielles-theater.de/UserFiles/File/ruxosuxunexeniriparokofi.pdfIn PDF document text
    • http://hamzalegalservices.com/userfiles/file/80100626838.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/25925812066.pdfIn PDF document text
    • http://rockycheng.com/ckfinder/userfiles/files/20924765909.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/nowikesazebebanagi.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613222e7c8ee4---85843656802.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA63 10880 bytes
SHA-256: 28587d5771d17596fb62d915af7db8d0ea3f5644579a8938fb4d73085977bba7
font_01_sfnt_off0000e3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B8 17680 bytes
SHA-256: 6c3cd4e9f219b6dc16ff7a018e137b49f631ed9308aabe7ed304c0091397dc5f
font_02_sfnt_off00011195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11195 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1