Malicious PDF — malware analysis report

Static analysis result for SHA-256 7220769c5db62e0f…

MALICIOUS

PDF

88.7 KB Created: 2021-03-19 05:23:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9531d09a34c00c610e827e482289af5f SHA-1: 5a61e2e5c4725c7227c00d463b93ef174ebbeccb SHA-256: 7220769c5db62e0f5c3108724b92a7b3333e494f7f22e9946dd7f6b5bdc69226
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, mentions 'Soundcloud apk for pc', indicating a lure for potentially unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://gimoguvi.ru/123?utm_term=soundcloud+apk+for+pc PDF link annotation
    • http://wonder-ita.space/cuanto_es_un_metro_en_centimetroshatzo.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/jj9Ngc9/3d_bowling_game_app.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/C2jeif8/nebarofukuwi.pdfIn PDF document text
    • https://cdn.sqhk.co/norejasiwiza/Ygfwgdc/83843024847.pdfIn PDF document text
    • https://cdn.sqhk.co/gogerazina/5gWxNha/zetogizimufezoruxutu.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/ieqkby0/enemy_strike_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482403/normal_60294d0acee94.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/ZOids1t/special_warranty_deed_colorado_form.pdfIn PDF document text
    • http://br1.red/xudipexibavajerazixepowelsptsx.pdfIn PDF document text
    • http://submonster.xyz/63764947042soivy.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/2hijejb/speed_bump_car_crash_test_speed_breaker_challenges.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392191/normal_5ff2ac600e584.pdfIn PDF document text
    • http://dikoxikikalonib.scienceontheweb.net/calendrier_ligue_2_2020_et_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409413/normal_60406db972e6c.pdfIn PDF document text
    • https://cdn.sqhk.co/lisakopew/9EAgchh/spinal_tap_11_reference.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368998/normal_5fc72b4a99e65.pdfIn PDF document text
    • http://fuziral.iblogger.org/benji_bananas_mod_apkpure.pdfIn PDF document text
    • http://javefuxola.getenjoyment.net/gloria_branden_jacobs_jenkins.pdfIn PDF document text
    • http://ketrovk.xyz/mechanics_of_materials_3rd_edition_cheggdpfoi.pdfIn PDF document text
    • https://cdn.sqhk.co/lexebogefaj/iiahzjx/nolazixawezevem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nakepusigazu.epizy.com/78835687174.pdfIn PDF document text
    • http://pejemevogoge.myartsonline.com/obituary_examples.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/how_can_i_check_my_check_engine_light_code_without_a_scanner.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10664 5140 bytes
SHA-256: cc6c53c901abb2bd2828a690b035e05589e531e3271e9e0047706fd9060354f5
font_01_sfnt_off000117f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F7 11248 bytes
SHA-256: a4d6e2ec91a3a6dae1472c07ed219b51dbfd7822180affa0dfc709bf5f2fa842
font_02_sfnt_off00013ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EC5 16144 bytes
SHA-256: f6e0f4a25f18a144688c6b7f40519a5efc98c72643b9054f89526e396d9b459d