Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6bace902fe583bc…

MALICIOUS

PDF

75.4 KB Created: 2021-02-27 00:47:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a3f17a0ecbf9ab95c8a7b7c18b7f4c99 SHA-1: 37f3bb21ce3a70d73173d26ace111019ceea0dad SHA-256: e6bace902fe583bcd95db44487fe77b5fe655a3d88cdac401e86a2dc5edd72bb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=nanostation+m2+wifi+range PDF link annotation
    • http://tapozifokun.mywebcommunity.org/are_disney_world_fireworks_cancelled.pdfIn PDF document text
    • https://loxogekero.weebly.com/uploads/1/3/4/0/134040689/87a2fca8397afc.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/how_to_learn_coding_online_free_quora.pdfIn PDF document text
    • https://fikejibin.weebly.com/uploads/1/3/4/3/134331262/1496405.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/assam_tribune_news_paper41wou.pdfIn PDF document text
    • http://whitecheat.xyz/puzzles_and_dragons_tier_listcq623.pdfIn PDF document text
    • http://ziwigosopijulal.mygamesonline.org/vaxexopuzo.pdfIn PDF document text
    • https://wifojulov.weebly.com/uploads/1/3/1/4/131438113/2722527.pdfIn PDF document text
    • http://cybety.xyz/simurabureranukutajugofavtaxmr.pdfIn PDF document text
    • http://pusikoxelumide.iblogger.org/right_triangles_worksheet.pdfIn PDF document text
    • https://navijaxilof.weebly.com/uploads/1/3/2/6/132696044/peneka.pdfIn PDF document text
    • http://lnstagaram-verifiedbadges-from.com/who_survives_in_maze_runner_2fldmt.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/test_de_inteligencia_emocional_goleman_para_imprimir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gusizozubamu.epizy.com/bivav.pdfIn PDF document text
    • http://povutov.epizy.com/78211386042.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/critique_of_everyday_life.pdfIn PDF document text
    • http://wokoziguroron.rf.gd/12916860398.pdfIn PDF document text
    • http://lutonidem.rf.gd/walgreens_blood_pressure_monitor_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/12962449799.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/popular_songs_fake_book.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/82809098552.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_off0000e7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E4 5248 bytes
SHA-256: c04036439bf3a47806119dafb4583804533c533d0b10e87a82404d752cd1315d
font_01_sfnt_off0000f9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C7 11900 bytes
SHA-256: 1786b13f8415ea422a87be3bd562f0ad26c46756b058041f3d9ecba99feedc9e

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