Malicious PDF — malware analysis report

Static analysis result for SHA-256 05141776a69b2827…

MALICIOUS

PDF

77.5 KB Created: 2021-03-22 06:22:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2a532ed72cf2786df4afeeb451c8c21 SHA-1: 2bfb89be6240396292096f283192da4769d31f06 SHA-256: 05141776a69b28270f4f4ffd04984ca1b5bdde847bc7cd14850fa26cb614d2ea
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a domain that appears to be part of a phishing campaign, disguised with keywords related to malaria. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/award?keyword=malaria+parasite+count+pdf
    • https://wapaberupuz.weebly.com/uploads/1/3/5/3/135397773/bumalareden.pdf
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/5696287.pdf
    • https://cdn.sqhk.co/tekuligote/jbhfgdH/whatsapp_wallpaper_images_black.pdf
    • http://kugaraginoja.mypressonline.com/air_conditioning_system.pdf
    • http://slimitalia.space/keduwimifepabadafojyo59.pdf
    • https://cdn.sqhk.co/jozopotuwomo/mRLH0Nf/wezorajazomozafokupitomun.pdf
    • http://rumepado.mypressonline.com/lelavetozifodabumo.pdf
    • https://mugejonisisekof.weebly.com/uploads/1/3/1/4/131437633/kawuzubim-sirenupokes-memazegolipim-latupop.pdf
    • http://wedipum.mygamesonline.org/82487723956.pdf
    • https://cdn.sqhk.co/noneniwetav/Ohcieij/36579814643.pdf
    • http://janafan.scienceontheweb.net/82967209201.pdf
    • https://cdn.sqhk.co/pufuxarabo/jEQgf8N/stackable_rings_with_names_and_birthstones.pdf
    • http://gazzsheff.xyz/blood_bowl_roster_sheet_2020au6ep.pdf
    • https://cdn.sqhk.co/guzowozuk/MHhdiih/61075032041.pdf
    • http://retys.fun/vector_t_shirt_design_templatexjicg.pdf
    • http://kitazixozakabu.sportsontheweb.net/braun_thermoscan_3_how_to_use.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/povodijirig/how_to_get_free_money_to_pay_off_debt.pdf
    • http://bavevex.onlinewebshop.net/wilodadabutonimoxekakaze.pdf
    • https://s3.amazonaws.com/kagedatabujo/dobeve.pdf
    • https://s3.amazonaws.com/tosevud/68433246493.pdf
    • https://s3.amazonaws.com/savukojubusum/saralusapowiditemiravupo.pdf
    • https://s3.amazonaws.com/bokelur/samsung_wf210anw_xaa_troubleshooting.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f058.bin
8262c48197cc903214d21f79d39a82edf98055a0b8f6e90b7e689d5887dfdafd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF058 5156 bytes
font_01_sfnt_off000101fc.bin
1dda33ccc38ca8728eab51bfb4ff55bce25e41c41dd9eb055d7aaeb19a58b612
pdf-font-stream PDF embedded font (sfnt) at offset 0x101FC 11404 bytes