Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74a5a29da62cf5c…

MALICIOUS

PDF

78.7 KB Created: 2021-04-05 21:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c2c9b83373c235f9ed09a52950087fc SHA-1: 73f9cd81820d5364f1b1f6397c159e567ceb5ed5 SHA-256: e74a5a29da62cf5c152b08450c28d20a0b6ad3e1372f9b7bea4fa5295b2b620a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL, https://xezojetit.ru/wix?keyword=aruba+rap+manual, which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a manual, aligning with the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=aruba+rap+manual
    • https://dovesexafonom.weebly.com/uploads/1/3/4/7/134702519/4608551.pdf
    • http://blubadgehelp.net/2003_ford_windstar_alternator_fuse_locationdwdkg.pdf
    • http://fafesixokegigi.getenjoyment.net/affluent_society.pdf
    • https://pobipumobixox.weebly.com/uploads/1/3/1/0/131070364/tubovijudosomebifuv.pdf
    • http://hopecommunitynaz.com/kwikset_909_stopped_workingt4939.pdf
    • http://trychambre.xyz/buxowomovimofnw6k3.pdf
    • http://tixshopclub.fun/what_do_the_lights_on_my_netgear_wifi_extender_mean83tnp.pdf
    • http://novonet.online/42738890982nebjf.pdf
    • http://winoorama.site/ejercicios_sujeto_y_predicado_para_primariacdr64.pdf
    • http://ruwemipuwev.mypressonline.com/8247659368.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xunilukegez/android_versions_list_a_to_z.pdf
    • http://radiviwix.onlinewebshop.net/22927730438.pdf
    • https://s3.amazonaws.com/voropa/health_and_safety_management_system_template_uk.pdf
    • https://s3.amazonaws.com/fuwuzerijofa/12060555232.pdf
    • https://s3.amazonaws.com/nolarifaforuxop/28925296686.pdf
    • https://s3.amazonaws.com/ropuba/jquery_ajax_post_file_upload_formdata.pdf
    • https://s3.amazonaws.com/dazinibonofobi/buwuledalogirug.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1de.bin
4fe1f96ba8db5cf35ca47cddaf067669eaebb9c038fc61eabfa1f5836d0fc525
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DE 1768 bytes
font_01_sfnt_off0000fa84.bin
9e15960d78c60f1c8f2acd43bf8232340da9deaf402fe3c84ff560fe9f995896
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA84 4916 bytes
font_02_sfnt_off00010b24.bin
187fffd8f2ccc3d9231d8448dbf69ddfe69ea7d19a24ea02e1ed0a60b6c1fb8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B24 10200 bytes