Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8fb0353a5671b5…

MALICIOUS

PDF

78.5 KB Created: 2021-01-26 15:06:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6da68b5986fb5018a8cd3c4282a9f338 SHA-1: ce18ed8e919bd7d1bcb98a09d34242009cf73ea6 SHA-256: ae8fb0353a5671b53ac2c08397db26931dce4c1bc4c274db4ac15b596530b18d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with many pointing to disposable domains, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent. While no scripts were explicitly extracted, the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' firings confirm the malicious nature of the PDF, likely exploiting PDF vulnerabilities or employing obfuscation to deliver its payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=naming+and+necessity+audiobook PDF link annotation
    • http://womenit.space/zuvijebewuzibupanugowqkcqp.pdfIn PDF document text
    • http://fruittea.space/original_pong_game_consoleqsvs7.pdfIn PDF document text
    • https://cdn.sqhk.co/dodirorip/iejbiak/jazivadofinozomafi.pdfIn PDF document text
    • http://f13x.xyz/globe_top_up_prepaid5vr0i.pdfIn PDF document text
    • http://indital.space/roxupetuxaix2.pdfIn PDF document text
    • http://medtechnika1.ru/gokeso2j1hu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447630/normal_5ff2a47da8799.pdfIn PDF document text
    • http://seedcraft.online/2020_election_predictions_vegas7mmyu.pdfIn PDF document text
    • http://istlan.space/3823108354146k9q.pdfIn PDF document text
    • http://logvoz.ru/retroarch_emulator_download_for_pc_32_bitinsif.pdfIn PDF document text
    • http://bloomwithdeanna.com/monkey_types_for_petscyn0s.pdfIn PDF document text
    • http://wownatural.fun/dancing_line_2_downloadeog1w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368223/normal_6002ef6fbca3d.pdfIn PDF document text
    • http://mangalvpodarok.ru/ar_zombie_shooter_survival_apk1fnhy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/goviwigax/manajemen_sumber_daya_manusia_pendidikan.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/firefox_browser_for_windows_free.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_off0000f2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DC 5404 bytes
SHA-256: ac651bf6f2344fae4948ba9fe5361958d87d8e73b182fe202d28c177f7639fbd
font_01_sfnt_off00010546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10546 11756 bytes
SHA-256: 26abdfbf9c0b8a18ddff4155c871fd4d5aa4c578dd06d80b2f0ceeb7e64d8025

Open this report in the interactive analyzer, or submit your own file for analysis.