Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ff4d117c86bd77a…

MALICIOUS

PDF

83.2 KB Created: 2021-02-15 20:22:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3b67986b0c24a57a57d06d69bb9d2994 SHA-1: c3a39cea92ec2b8be00329cc6ec552ee41f695bf SHA-256: 5ff4d117c86bd77add16becc973c72ae5886fea5e160ff41f93b6a789b22757c
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9994

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/wix?keyword=tentacle+wars+2+zone+10 PDF link annotation
    • http://aycotoro6.xyz/21827237438re726.pdfIn PDF document text
    • http://boldly-grow.com/active_voice_and_passive_voice_tablecutls.pdfIn PDF document text
    • https://fuwipinax.weebly.com/uploads/1/3/4/0/134016709/8c6dbb.pdfIn PDF document text
    • https://zovezeko.weebly.com/uploads/1/3/4/6/134697242/2570887.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/ijejjij/relaxing_spa_music_for_sleep_30_minutes.pdfIn PDF document text
    • https://ranitezal.weebly.com/uploads/1/3/1/4/131438109/f618d43f2f1603c.pdfIn PDF document text
    • https://cdn.sqhk.co/noxutuvixi/dVtgdfc/35255097519.pdfIn PDF document text
    • http://kernig.online/afirmaciones_louise_hay480ca.pdfIn PDF document text
    • https://cdn.sqhk.co/milevatomog/RieVjin/zotasilowerekasuzadaw.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/gjXhjVe/52443764298.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/webipejonavuv/floral_template_border_vector.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/11681671848.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/app_camera_b612.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/minecraft_ascentia_launcher.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/zezalasapufur.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/abstract_reasoning_practice_test_1.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/22075600906.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFF 4948 bytes
SHA-256: bb0df65bdad63d2e79a8542f4c021ac322ac2710959e63454ba753a1da6e6aaf
font_01_sfnt_off0000edea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEA 4284 bytes
SHA-256: 25c42c89813add043ee9253f84bf7195d0ca82f096f7fc6da7c3f2dfd767cad2
font_02_sfnt_off0000f970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF970 9712 bytes
SHA-256: 58780d6ec0e3052c9133aaaf0b411a473a1a373ce073e80ce97903baa794424d
font_03_sfnt_off00011b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B14 16396 bytes
SHA-256: a9d664dd083a868404960094170b4d011463f7983a46d89461e17a2e15b458ff
font_04_sfnt_off000130c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C6 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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