Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98d6af8d448e264…

MALICIOUS

PDF

70.2 KB Created: 2021-02-25 10:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 74418ce30b96dbba8590da4393cd2340 SHA-1: 10bd2b1dbd8e938108c24489cb8452bf9effedc0 SHA-256: e98d6af8d448e264226123cf49bdbac8236f7962f34d820ab70a79b5a0ee7769
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://leonvi.ru/aws?utm_term=shark+navigator+lift+away+dlx+with+extended+reach PDF link annotation
    • https://cdn.sqhk.co/wakewafo/hjgfhDu/bridal_hair_and_makeup_artists.pdfIn PDF document text
    • https://cdn.sqhk.co/buganixezu/ihhiegj/dj_marshmello_songs_rooftops.pdfIn PDF document text
    • http://persequen.com/nikejitekikgnuic.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/inland_letter_of_credit_format_india.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/iaDHhes/demon_slayer_rpg_2_wiki_roblox.pdfIn PDF document text
    • http://jewlgems.com/40804633737wppio.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/coleman_lanterns_for_sale_south_africa.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/2QgjUif/55850161562.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/dell_optiplex_760_upgrade_cpu.pdfIn PDF document text
    • http://freshnatur.fun/morgan_anesthesia_6th_edition_free_downloadqnquq.pdfIn PDF document text
    • http://greatmasters.biz/55954994741y5f5s.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/nediwozarotokenera.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://sidepojedava.myartsonline.com/core_connections_algebra_1_chapter_4_answers.pdfIn PDF document text
    • http://jegowijuvu.epizy.com/83179447989.pdfIn PDF document text
    • http://gilovimarej.epizy.com/alchemist_leveling_guide_ro_mobile.pdfIn PDF document text
    • http://juwijez.rf.gd/microchip_cat_feeder_manual.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_off0000c435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC435 5380 bytes
SHA-256: b11843b4d857960b2e733ddd48884ddc7b713242654f3b4a5474d97fd53e1457
font_01_sfnt_off0000d68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68D 11036 bytes
SHA-256: 58eb77c3bf2dc48e870ebf0fd496ba467e53792ab9e5545c9d836483b32d2cde
font_02_sfnt_off0000fbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f