Malicious PDF — malware analysis report

Static analysis result for SHA-256 426964fd3dd2039c…

MALICIOUS

PDF

79.7 KB Created: 2021-02-26 03:51:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7614670d077927f8c3399a1ce49f3bab SHA-1: d1ed41b06ccfbddc2f53894c2ea51e24c997b715 SHA-256: 426964fd3dd2039ccb245a546ddf356315494a774515e376e25f58d80a128ae5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/strik?utm_term=what+is+the+disease+called+als PDF link annotation
    • http://tdsevsvet.ru/61298410740ryvpj.pdfIn PDF document text
    • http://duplicwcnj.space/992919245340q1ug.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/smart_calling_art_sobczak_free_download.pdfIn PDF document text
    • http://ipai.online/100195846301w7zq.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/YaqKgfJ/meselirax.pdfIn PDF document text
    • http://rajelakitapeki.iblogger.org/vertex_form_of_a_quadratic_worksheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/F3jjic6/kifononojikimarot.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/batman_the_dark_knight_rises_full_movie_download_in_hindi.pdfIn PDF document text
    • http://idealsit.space/encyclopedia_of_exercise_anatomy_downloaduoq23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484818/normal_60324a0d349bd.pdfIn PDF document text
    • http://doucheop.xyz/85825990723qw3m5.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/ijidAhg/25388445875.pdfIn PDF document text
    • http://keep-travel.com/vine_soundboard_ringtones_notification_sounds_androids1ejb.pdfIn PDF document text
    • http://lovelatu.iblogger.org/samsung_s21_ultra_release_date_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/leperanurosi/ZijjiBQ/metal_shooter_run_and_gun_hack_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rifarako/lhghahb/sojojewegibaxamikiwit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412591/normal_601a3e5d8df3e.pdfIn PDF document text
    • http://crawlmqyu.space/amperemeter_op_acculadernbgw0.pdfIn PDF document text
    • http://mewanomape.iblogger.org/72407796886.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nabenejajoko.myartsonline.com/57346263467.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B4 4516 bytes
SHA-256: 5f89cf745fd85f399ac80b03d6c1ab083317a0e063126600b2b804e3e01a0827
font_01_sfnt_off00010015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10015 10468 bytes
SHA-256: e1b7cd55841e6c56b08c1707a65a6d31f28356bd0e24577adc1831096c476950
font_02_sfnt_off000123a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A9 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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