Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3bb69df59612859…

MALICIOUS

PDF

72.0 KB Created: 2021-03-04 10:07:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 01b9f53f1598065a80c4155491301119 SHA-1: e4d250e405626911ba36d9019325d9e7da6e9f04 SHA-256: e3bb69df59612859115d3a923b1edeb2b4cbb4c4b2ad21ce66c0342bd1f916b0
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 an embedded URI pointing to 'jacksth.ru', which is likely a malicious domain used to host a phishing page or distribute further malware. The document's content, though heavily obfuscated, suggests a lure related to educational materials.

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://jacksth.ru/wix?keyword=transformations+reflections+worksheet+answer+key PDF link annotation
    • https://mumovukejepi.weebly.com/uploads/1/3/1/4/131483147/muroniveji-mepuzusosaliluf-ramozop.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/what_are_the_rules_for_the_order_of_operations.pdfIn PDF document text
    • http://gizovivomiz.getenjoyment.net/fagubuxefiduraxobe.pdfIn PDF document text
    • http://barojenixumaja.iblogger.org/how_to_connect_brother_wifi_printer_to_ipad.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/what_is_the_value_of_n_in_the_equation_1_22n46-942n3.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/rizijubovapuk/sri_rudram_namakam_and_chamakam_lyrics_in_kannada.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/dusk_till_dawn_piano_sheet_music_free.pdfIn PDF document text
    • http://vapovalexuma.epizy.com/19887141028.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/tunemuzaduwipogunolebami.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/adelphoe_terenzio.pdfIn PDF document text
    • http://mekavebij.epizy.com/gmat_guide_2020.pdfIn PDF document text
    • http://tifatorebuvu.epizy.com/is_diary_of_a_wimpy_kid_a_chapter_book.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/droichead_post_observation_template.pdfIn PDF document text
    • http://munekekenagixo.rf.gd/gedebif.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/99830725470.pdfIn PDF document text
    • http://pabadebaluke.rf.gd/pottu_amman_movie_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_off0000dd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD99 5328 bytes
SHA-256: 4587174e0f32d3b59980590ae74275eee43e785331005ec7f0e0e298a77dcbf1
font_01_sfnt_off0000efa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA1 10312 bytes
SHA-256: f85e87f7715265ab38a928d419f97cfb6a6574f2c2de723aa74a4f73f269eaa9

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