Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c500ef5e1b9939…

MALICIOUS

PDF

77.9 KB Created: 2021-01-18 14:33:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e705c5fee1ad373b1570e15b0468aed3 SHA-1: 82963be7f2a6d1edf861f2fbf85bcd24c7905c69 SHA-256: d4c500ef5e1b9939ea94f5ffb4771e1e1ae2e37345ddd22fe548c469984cbe2a
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to 'https://jacksth.ru/123?utm_term=sam+kinison+wild+thing+wiki', which is a strong indicator of a phishing or malware distribution attempt. The PDF structure itself does not contain executable scripts, but the presence of external URLs suggests it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/123?utm_term=sam+kinison+wild+thing+wiki PDF link annotation
    • https://site-1175246.mozfiles.com/files/1175246/44428623942.pdfIn PDF document text
    • http://vudujupuboneg.22web.org/can_i_transfer_icloud_backup_to_android.pdfIn PDF document text
    • https://site-1167973.mozfiles.com/files/1167973/fixonumivegewipi.pdfIn PDF document text
    • http://vilelares.iblogger.org/adform_london_limited.pdfIn PDF document text
    • http://sokuzise.iblogger.org/84198403305.pdfIn PDF document text
    • http://kurekarer.22web.org/beautiful_images_of_nature_hd.pdfIn PDF document text
    • https://site-1173857.mozfiles.com/files/1173857/gadejejikekijininebazor.pdfIn PDF document text
    • https://site-1178487.mozfiles.com/files/1178487/zobituraduxekinudo.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/nisoxow/template_menu_html_css_responsive.pdfIn PDF document text
    • http://pakekaririwofas.rf.gd/nigerian_worship_songs_2018_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/48482203492.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/8437648169.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/income_support_reporting_website.pdfIn PDF document text
    • http://talakukatutevib.epizy.com/leripijafovowiwabuwasu.pdfIn PDF document text
    • http://pagupim.epizy.com/visual_reinforcement_audiometry_tick_sheet.pdfIn PDF document text
    • http://wunekoxewufomaf.epizy.com/boat_bill_of_sale_template.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/avatar_filme_para.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/adiabatic_demagnetization_of_paramagnetic_salts.pdfIn PDF document text
    • https://s3.amazonaws.com/wepeliniru/vizawagunerirunedikix.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_off0000f298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF298 5400 bytes
SHA-256: 9f7b447502f135b2475b9f13af8070482535d4684bbf4b49cc405d57aea6df04
font_01_sfnt_off000104e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E5 11300 bytes
SHA-256: ae8f6eb3009e90c183a0640e6d3118c4430dbf62a6e0a3760f2a27495deb6881

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