Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe6bce109b7c2d0…

MALICIOUS

PDF

96.2 KB Created: 2021-06-07 13:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 25ac8d6501d42f2676783c9499a654c4 SHA-1: 272e35d488c041252d9c6fbb6b3ed14b5c10e4c5 SHA-256: efe6bce109b7c2d016e8275ac848fcdf7015d52986ec9c5566e7084be54938b4
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 external URLs, with one heuristic identifying it as a link farm on disposable hosting. The document body, though heavily obfuscated, suggests a lure related to 'gps spoof pokemon go'. No scripts were extracted, but the presence of external links and the high confidence detection indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ketchas.ru/pbw?utm_term=gps+spoof+pokemon+go+2020+android PDF link annotation
    • https://nebunabimumebu.weebly.com/uploads/1/3/4/4/134480995/131d8bfddf6f.pdfIn PDF document text
    • https://lapefobok.weebly.com/uploads/1/3/4/6/134663543/xetokejujebodorel.pdfIn PDF document text
    • https://vixugusimuxomuj.weebly.com/uploads/1/3/0/9/130969476/kixanuzaluvufe-xulivuw-funorut-zalevufuwanar.pdfIn PDF document text
    • https://vapasunodisina.weebly.com/uploads/1/3/0/8/130873802/2712652.pdfIn PDF document text
    • https://juxibawazorar.weebly.com/uploads/1/3/3/9/133997202/fojapizikaf-gumidixikun-lusepokotuxus-kelusimapa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://degagogo.pbworks.com/f/2012_colorado_manual_transmission_fluid.pdfIn PDF document text
    • http://xelivolofuso.pbworks.com/f/cognitive_behavioral_therapy_for_dummies_download.pdfIn PDF document text
    • http://bovojigu.pbworks.com/f/ratio_of_perimeter_and_area_of_similar_figures_worksheet_answers.pdfIn PDF document text
    • http://niwomif.pbworks.com/f/salary_after_11th_bipartite_settlement_quora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96879a66-4dbe-45a3-9e17-f0f42fe7e62d/bofidotinojuruzop.pdfIn PDF document text
    • http://ziludezubeju.pbworks.com/f/passive_voice_reading_comprehension_exercises.pdfIn PDF document text
    • http://ropotupi.pbworks.com/w/file/fetch/144562362/how_do_i_reset_my_onkyo_receiver_tx_sr373.pdfIn PDF document text
    • http://larabefejaji.pbworks.com/f/93002670979.pdfIn PDF document text
    • http://junerew.pbworks.com/f/explode_the_code_grade_levels.pdfIn PDF document text
    • http://vawijoj.pbworks.com/w/file/fetch/144625683/78723642111.pdfIn PDF document text
    • http://ruwezebom.pbworks.com/f/wrong_turn_6_tamil_dubbed_movie_free_download_tamilrockers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a2aee5-7789-4dd6-8565-8a00327b5c2d/65859028094.pdfIn PDF document text
    • http://balejuw.pbworks.com/f/what_is_mep_revit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2edb400-178f-48d0-8508-99521570d746/marakas_obrien_introduction_to_information_systems_16th_ed._2013.pdfIn PDF document text
    • http://fuxijovipa.pbworks.com/w/file/fetch/144721251/76411619708.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_off000122aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AA 5696 bytes
SHA-256: 39b6a6b0fce587e30eed19529c5154c1fea95ab5ede72641ca780b748dbd22c2
font_01_sfnt_off00013605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13605 11368 bytes
SHA-256: f80c2a856593c5e829391b3a3fd6469f1f9c703437f4b6764ae6e5e3d443362c
font_02_sfnt_off00015c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C6A 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501