Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b46be9b4c163383…

MALICIOUS

PDF

65.3 KB Created: 2021-05-10 08:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fc3972d9146015d3e9266492a29a2378 SHA-1: 7e31b93149adf8a93b1d7a46b541f7c436ca4e3b SHA-256: 0b46be9b4c163383537b87261deaa0555d4f20592c99b476617c6b35c1185136
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, including one pointing to 'lozipotod.ru', suggesting it's designed to redirect users to potentially harmful websites. The document body, though heavily obfuscated, appears to contain metadata related to educational material, likely a lure.

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://lozipotod.ru/strik?utm_term=eureka+math+grade+8+module+2+lesson+15 PDF link annotation
    • https://cdn.sqhk.co/ponigubik/iffDyhe/ios_x_launcher_pro_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gukitane/hgjmu7R/bawubedonabol.pdfIn PDF document text
    • http://zawoxilejaku.66ghz.com/dufinivonewodimo.pdfIn PDF document text
    • https://cdn.sqhk.co/totarujined/iTgiide/fumigirevarabaj.pdfIn PDF document text
    • http://towexiwi.sportsontheweb.net/accident_and_emergency_radiology_a_survival_guide_download.pdfIn PDF document text
    • http://lorinov.22web.org/64753464678.pdfIn PDF document text
    • https://cdn.sqhk.co/kolusugego/trYQigp/88595932779.pdfIn PDF document text
    • http://positarinirib.22web.org/sawiwolizum.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/iVhdVjc/hsbc_bounce_back_loan_scheme_problems.pdfIn PDF document text
    • https://cdn.sqhk.co/tejosepu/g4FjfDG/darth_vader_ringtone_android_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wilosokanik.myartsonline.com/biodiversity_loss_and_its_impact_on_humanity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7063540c-66c0-4468-8109-e34eacbba279/how_to_properly_cite_sources_in_research_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ca684ee-ae2f-43a1-8487-133fa2fd310f/rojomedelaxezufomuwej.pdfIn PDF document text
    • http://vomalowo.epizy.com/maggie_mistal_interview_with_denise_richardson_singer.pdfIn PDF document text
    • http://regaguw.rf.gd/lexax.pdfIn PDF document text
    • http://fowagamop.rf.gd/art_of_public_speaking_book.pdfIn PDF document text
    • http://rupemogevewis.rf.gd/dc_shunt_motor_speed_control.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_off0000c2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C9 5760 bytes
SHA-256: 2fa6387422a289d237e8872e1d0e7a824a1ae7e3451775bcc155f93b7c1f5853
font_01_sfnt_off0000d63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63F 9936 bytes
SHA-256: 09d2cc259f12899701ab78c8cfd19d4e247214e7ba03f9a39e84788f20afd639

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