Malicious PDF — malware analysis report

Static analysis result for SHA-256 82e65bf2e063a5da…

MALICIOUS

PDF

71.8 KB Created: 2021-03-29 07:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bb4db5bb35bffd4bb39e44e9b932458d SHA-1: 856f59cdb3257a8fdd53db1f02a2c9e58e08d5ea SHA-256: 82e65bf2e063a5da380099dede7f10d75247be6ef684bca0698f9188c9360497
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://crophysi.ru/aws?utm_term=english+vocabulary+in+use+advanced+book+with+answers+vocabulary+reference+and+practice+3rd+edition PDF link annotation
    • http://vovality.club/stick_man_games_unblocked6tosq.pdfIn PDF document text
    • http://axacheat4.xyz/the_essential_feminist_reader_freen1r7h.pdfIn PDF document text
    • http://hangookoil.ru/fios_tv_remote_setup0009m.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6674166f-eb58-46b1-9d38-a528bc95e02c.filesusr.com/ugd/e38d8e_cdee33fdf7b4406eb52c9a6eebd176cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/dofofetuso.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/77484324786.pdfIn PDF document text
    • http://foburug.rf.gd/xojadi.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/automation_anywhere_control_room.pdfIn PDF document text
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_4b8967c4cfb2426d8b2980e2dc4223d5.pdf?index=trueIn PDF document text
    • https://29ca30ec-7ad4-487f-8637-d2d67f3a323c.filesusr.com/ugd/10b11f_5b973a57094f44b5b47f752726bfa2ad.pdf?index=trueIn PDF document text
    • http://zumidid.rf.gd/30353787267.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/41831837314.pdfIn PDF document text
    • https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_ba1ccc8c8f2a4fd1bc337939238efcf6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapijifas/volunteer_appreciation_certificates_templates.pdfIn PDF document text
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_3727475a9ad84426a0ea19bfb77cfbe4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/jabotogeko.pdfIn PDF document text
    • https://921790ca-7b53-43bd-a25d-275d6f056404.filesusr.com/ugd/9d24cb_8ee1d93375084c4a8fd96a117ad6fac1.pdf?index=trueIn PDF document text
    • https://729282ec-1290-4cbc-9302-cf8a24acd4c7.filesusr.com/ugd/42c189_78146b896ad444b4be9db282951ad476.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/iim_ahmedabad_fabm_placement_report.pdfIn PDF document text
    • https://37976aa0-f55f-47d3-847a-8d185b13ebf6.filesusr.com/ugd/1d6212_aa0afe21150c4cbf82084a491eeeb46f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liguwubore/best_of_dj_song.pdfIn PDF document text
    • http://lifotag.rf.gd/per_la_gloria_d_adorarvi_tenor.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/3371186620.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C1 5996 bytes
SHA-256: 3a533f81fa74f790ee048e02747b31cdeee12422ca65a4506dd34d49d4db87b8
font_01_sfnt_off0000ea47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA47 10520 bytes
SHA-256: 4a43d13aa0b7eef3ba1e2506892f66fc750d4ed32448ab8050f8ecab68ea8188

Open this report in the interactive analyzer, or submit your own file for analysis.