Malicious PDF — malware analysis report

Static analysis result for SHA-256 dda1dde26dbb9f4a…

MALICIOUS

PDF

73.7 KB Created: 2021-01-21 08:27:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 73ef6e71b9013a246635ab58a60f7ae8 SHA-1: 9b16e91b0e5596ff361a8fc725410327259679ec SHA-256: dda1dde26dbb9f4a05f15d265dd030d6291c4ac252422dd7687498dd355afe42
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=fundamentals+of+industrial+hygiene+6th+edition+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/kagalitisup/wreqjh7/52089543830.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/GYjfLhj/71334225210.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/t3jjD8X/bubble_shooter_with_friends_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/j2hgwge/lolimerorok.pdfIn PDF document text
    • https://site-1173368.mozfiles.com/files/1173368/android_emulator_pc_linux.pdfIn PDF document text
    • https://site-1166618.mozfiles.com/files/1166618/cbse_2020_sample_paper_class_10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387921/normal_5fde4c8411346.pdfIn PDF document text
    • https://site-1178703.mozfiles.com/files/1178703/47379493697.pdfIn PDF document text
    • https://site-1177655.mozfiles.com/files/1177655/bandhan_janam_janam_ka_serial_video.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/aphiNgK/75253422925.pdfIn PDF document text
    • https://site-1211292.mozfiles.com/files/1211292/idle_hotel_tycoon_mod_apk_download.pdfIn PDF document text
    • https://site-1242663.mozfiles.com/files/1242663/28193416541.pdfIn PDF document text
    • https://jovigazever.weebly.com/uploads/1/3/1/6/131637362/zizovupifukilus.pdfIn PDF document text
    • https://cdn.sqhk.co/miropefaneka/6hdJZSA/vikings_cast_season_4_astrid.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/mqejbLx/hair_salons_open_on_sunday_in_raleigh_nc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422658/normal_6003617c7ac1c.pdfIn PDF document text
    • https://cdn.sqhk.co/rotogogoji/hgj3ggl/best_military_drones_for_sale.pdfIn PDF document text
    • https://site-1175000.mozfiles.com/files/1175000/44597051288.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD608 5756 bytes
SHA-256: 1425782f95733ce9805fd1515e4ef8fba8ce7ca37973104a4a5e7e9e3aba2305
font_01_sfnt_off0000e997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE997 14112 bytes
SHA-256: dd8e2d35b0261c50eba546ac83c70756b519adae72be64c1c84a95f7007756c7

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