Malicious PDF — malware analysis report

Static analysis result for SHA-256 86875b38a26add31…

MALICIOUS

PDF

74.8 KB Created: 2021-02-28 00:14:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 0a3d9d5191e9991b805ca2ffb4167219 SHA-1: c7aa790d100a3d057974b731a099fd578ebcfa9e SHA-256: 86875b38a26add315d6160a2cdd13db195505d53d35502553247fd74b25f0eec
104 Risk Score

Malware Insights

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

The file is identified as malicious by a machine learning classifier and ClamAV, with a high risk score. It contains an external URI pointing to a suspicious domain, and the document body, though heavily obfuscated, suggests a lure related to 'Minecraft guide books'. The presence of embedded URLs and the 'Urgency / deadline lure' heuristic further support a phishing or malicious download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dugedepap.ru/award?keyword=minecraft+guide+books+8-book+collection PDF link annotation
    • http://pubgucbayim.com/1654890726sj6tq.pdfIn PDF document text
    • http://korogesubelokut.mypressonline.com/best_free_app_to_learn_chinese_characters.pdfIn PDF document text
    • http://copyrightmediahelp.com/broadsheet_newspaper_dictionary_definition7afms.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/dsi_revenus_2018_viergeipzwl.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/33660451361.pdfIn PDF document text
    • http://worldworkbook.com/para_q_sirve_el_te_de_manzanilla_con_canelai0qib.pdfIn PDF document text
    • http://dayzcommunity.info/what_are_the_steps_in_the_engineering_processj0bsm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tokit/windows_server_2012_vmware_tools_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/82005908443.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/zuledununifimev.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/how_do_i_program_a_comcast_remote_control.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/past_and_present_tense_worksheet_year_3.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/why_are_tropical_storms_found_near_the_equator.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/fodifikujululi.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_off0000e6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E3 5624 bytes
SHA-256: 90a26f0f65e87b56613ca0d6cd7976e443411f274f1c445ec8f1dc41f112da6a
font_01_sfnt_off0000fa1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1F 10632 bytes
SHA-256: 122d3c8fd9bc4a67ecfc2a901f42d4ffa44a2f47129f4896aa5ad4e170a4d2a0

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