Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c70bb5f1c24fcb…

MALICIOUS

PDF

76.5 KB Created: 2021-02-18 23:42:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 6324b181b910eb900151a5e4e03ec491 SHA-1: 401d66e1f63b3d01190e203ce1551dafb8ce9bf6 SHA-256: 62c70bb5f1c24fcb1e790dcf7246ed4c359934f8fc8d9ea610e278df42bb6e2f
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one prominent URL pointing to a site offering 'run game unblocked' which is a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links and disposable hosting suggests a link farm designed to redirect users to malicious content, likely a phishing page or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=run+game+unblocked PDF link annotation
    • https://cdn.sqhk.co/vibisimak/ijhb30N/video_call_recorder_for_whatsapp_2020.pdfIn PDF document text
    • http://hushseo.online/37652854687sfrnh.pdfIn PDF document text
    • http://byt-upak.ru/lfs_s1_s2_unlocker_download1htvr.pdfIn PDF document text
    • http://fortuneo.best/game_dev_story_windowszmshh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464521/normal_5fdc00d66e93b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419818/normal_5fe053ae85358.pdfIn PDF document text
    • http://lolkek.xyz/wibofadoxapimunipuwexuvuxi1.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/gheheme/nesoku.pdfIn PDF document text
    • https://cdn.sqhk.co/gexedamej/E0ggghh/castaway_wilson_costume.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415046/normal_5fd665047db63.pdfIn PDF document text
    • http://reduslim-italy.site/sony_reader_apktzgrk.pdfIn PDF document text
    • http://reduslim-italia.website/whatsapp_status_long_video927us.pdfIn PDF document text
    • http://fionainthefield.org/fapakovedimedawadxbc16.pdfIn PDF document text
    • https://cdn.sqhk.co/judawube/bhgFjjK/boombana_and_jollys_lookout.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376354/normal_600498eab020b.pdfIn PDF document text
    • http://autokenn.com/walulufebuzidivajejesuvd3kup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://selofedibaxonal.epizy.com/a_r_rahman_bgm.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/92814940211.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/metal_casting_process_video_free.pdfIn PDF document text
    • http://bafimilatape.epizy.com/behringer_x_air_xr12_manual.pdfIn PDF document text
    • http://jusarim.epizy.com/alarm_app_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/terosujimatuzewikawetoroj.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/30296050752.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_off0000ed77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED77 5196 bytes
SHA-256: 0d692272762dd157f2b2add1d15591de4f8d60769b7df69c41374ee75f90f84f
font_01_sfnt_off0000ff1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1E 10656 bytes
SHA-256: ab007b372281b778d6f026e8780747898ea634967e4d0fa0fa3e25c40d94e0d0

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