Malicious PDF — malware analysis report

Static analysis result for SHA-256 36b15c9e52c0e8f7…

MALICIOUS

PDF

83.5 KB Created: 2021-03-26 17:38:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c29b11ef6e405d87be2438d46d4c8c20 SHA-1: eece56a5eb168e21e1ab7b130a862cacdc132f49 SHA-256: 36b15c9e52c0e8f710da276bb52dc1643ae6866417f539df0851774e61e856a1
164 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to S3 buckets and other domains, suggesting a link farm or SEO manipulation tactic. One embedded URI, 'https://leonvi.ru/wix?keyword=kjv+bible+apk+for+android', is particularly suspicious and likely part of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/wix?keyword=kjv+bible+apk+for+android
    • https://gabesusot.weebly.com/uploads/1/3/4/8/134895193/44e073c.pdf
    • https://texapusozos.weebly.com/uploads/1/3/1/4/131407592/danur.pdf
    • http://xunajoza.22web.org/gavug.pdf
    • https://ribupawotomimam.weebly.com/uploads/1/3/4/6/134694318/xuzavebogimo.pdf
    • https://nefolebar.weebly.com/uploads/1/3/4/4/134400051/wipajofi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/sefepugolupalax/apresentao_power_point_pronta.pdf
    • https://s3.amazonaws.com/zepifudoxapo/90629028971.pdf
    • https://uploads.strikinglycdn.com/files/588e8dd9-da86-4aae-b711-1bc9aa5ed600/sesixoladazusabotu.pdf
    • https://s3.amazonaws.com/wuwabobujasivor/marathon_wr50m_watch_set_date.pdf
    • https://s3.amazonaws.com/jadere/pioneer_deh-x6500bt_harness.pdf
    • https://s3.amazonaws.com/bagisi/kadamban_movie_songs_in_masstamilan.pdf
    • https://s3.amazonaws.com/galinikagopit/71782394520.pdf
    • https://s3.amazonaws.com/firigugixujotov/krishna_bansuri_video_song.pdf
    • https://s3.amazonaws.com/nemafu/36725356508.pdf
    • https://uploads.strikinglycdn.com/files/8ee433b0-bd7e-41d9-98a0-de26a1426f65/how_does_the_big_easy_turkey_fryer_work.pdf
    • https://uploads.strikinglycdn.com/files/460e25a8-cf11-46b8-b4e0-22c91bb2c5da/robertshaw_thermostat_programming_instructions.pdf
    • https://uploads.strikinglycdn.com/files/34594a77-b764-429f-93e5-cbe7a47818d8/wolisugurewemalejas.pdf
    • http://zaxisomal.epizy.com/10th_maths_guide_2020_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e795.bin
eb1321b19e44ecf054fbc6929a63f5f93fabc1bddbaab46ecaab554597c2f9b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE795 4872 bytes
font_01_sfnt_off0000f82e.bin
789eff203c7178359953a3324fce4672e2906082c5d62ce6d01d33120998a235		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF82E 10776 bytes
font_02_sfnt_off00011d5e.bin
9c7926b8929b88a1dffb52ec04bcfb477868fd459509337312ce674bafabbb6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5E 16192 bytes
font_03_sfnt_off0001326c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1326C 4324 bytes

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