Malicious PDF — malware analysis report

Static analysis result for SHA-256 04999f5c2cef8cf1…

MALICIOUS

PDF

93.0 KB Created: 2021-03-06 10:33:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab261670be86e73aba79cb8b1bbb894d SHA-1: 9f17d13e282b208e8c1acf23c1f91ab918355b5b SHA-256: 04999f5c2cef8cf1156be4857ad2b9d0089f809d2b332b719fc53b7bf6729a94
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, appears to be a lure related to historical search queries, suggesting a social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=what+was+life+like+in+europe+before+ww1
    • http://prizinsta.info/jefigifewajite3x7v7.pdf
    • http://metazoaapc.fun/3253797498tskmn.pdf
    • http://tiruxukanemaga.iblogger.org/lawinen_report_schweiz.pdf
    • http://circleshtang.xyz/t_sql_tutorial_free_downloade4mih.pdf
    • http://milanomoda-italy.website/852451265568vpvr.pdf
    • http://reduslim-ordina.site/nanda_nursing_diagnosis_2018_to_2020gzw48.pdf
    • http://fishing-rods2.club/registro_anecdotico_preescolar5zv51.pdf
    • http://vittorguxx.site/diseo_de_experimentos_montgomeryxwrm9.pdf
    • http://avit0.pro/17790280366ztm3c.pdf
    • http://the-english-temple.com/40623104783ph5vq.pdf
    • http://huseyincanx.com/30008071123xv5b3.pdf
    • http://gatorama.site/doum_gn_fon_mzikleri8ovvz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/kofabube/ravuzak.pdf
    • https://s3.amazonaws.com/rotowan/tonedevisa.pdf
    • http://repuvamiperubo.epizy.com/website_to_get_free_chegg_answers.pdf
    • https://s3.amazonaws.com/pajeriramal/excel_pivot_table_range_multiple_sheets.pdf
    • http://modamelipoduwi.rf.gd/find_the_wavelength__of_the_80.0-khz_wave_emitted_by_the_bat._express_your_answer_in_millimeters.pdf
    • https://s3.amazonaws.com/dowavelaxam/pifibajigikekaxevokeroneb.pdf
    • https://s3.amazonaws.com/votubukaxogilix/10123462851.pdf
    • https://s3.amazonaws.com/xuvamuba/68121718236.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_off00012248.bin
c596bd6ec5904a712aecc5013c142a51b651d5b561549694281b079249d8226f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12248 5232 bytes
font_01_sfnt_off00013419.bin
ffc849ee73b8525c8c0dbc0212ec53adb6158440d2970300e6f259295716e880
pdf-font-stream PDF embedded font (sfnt) at offset 0x13419 10636 bytes
font_02_sfnt_off0001587d.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x1587D 4324 bytes