Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f747effb9a664b…

MALICIOUS

PDF

93.8 KB Created: 2021-03-17 02:48:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c4e8a85af8225d64ea8178ec2e4b391c SHA-1: 9e264135a80d829c5272199f96b83df22550fc90 SHA-256: e5f747effb9a664b0bcb579e260476077be82f071fd2e6d25cc5a8278920515f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://vilenefex.ru/award?keyword=ayurveda+books+in+kannada+pdf+free+download PDF link annotation
    • https://ganubosi.weebly.com/uploads/1/3/4/5/134506756/tasutokob_pusubaw.pdfIn PDF document text
    • https://cdn.sqhk.co/jimavidozeze/cMIuje6/20001239846.pdfIn PDF document text
    • http://shtampshop.ru/zubekiraxexuvafuwiwolukbwt.pdfIn PDF document text
    • http://kofibilo.22web.org/75357313805.pdfIn PDF document text
    • https://cdn.sqhk.co/morureju/jjjejgF/zegoruxevajate.pdfIn PDF document text
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/2334674.pdfIn PDF document text
    • http://ketadiets.site/casio_g_shock_wr20bar_manual_espaol5lt90.pdfIn PDF document text
    • http://xovitexi.iblogger.org/xogumowodon.pdfIn PDF document text
    • http://smartcoin.design/how_to_use_a_hoover_agility_carpet_cleanerz06rn.pdfIn PDF document text
    • https://cdn.sqhk.co/nogupuzejewe/dibSiiy/boost_energy_app_android.pdfIn PDF document text
    • https://cdn.sqhk.co/jesuzedavoti/hjdgiiZ/tezuramikovamej.pdfIn PDF document text
    • https://cdn.sqhk.co/lisakopew/jbdUSic/police_helicopter_flying_simulator_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://wukekikisowif.epizy.com/96995797233.pdfIn PDF document text
    • http://dovanokeji.epizy.com/how_to_read_lipid_profile_report.pdfIn PDF document text
    • http://jefeduwikiw.epizy.com/bipadimetutelofesidul.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/how_to_tell_which_delta_cartridge_i_need.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/definitionado_answers_level_6.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/pokodelolojuzagagi.pdfIn PDF document text
    • http://gewapapis.epizy.com/xuwilusaledafidone.pdfIn PDF document text
    • http://mekavebij.epizy.com/moxagafavipebozebabutuko.pdfIn PDF document text
    • http://sabukizazuse.epizy.com/bole_chudiyan_full_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/xijedeno.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/bollywood_movies_in_english_version.pdfIn PDF document text
    • http://fexabowowerol.epizy.com/waranalatipununowazaka.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5D 5484 bytes
SHA-256: 7e3f4642fa9d6cc5e7afa87661b39be7d7cfe360f4bb8c47a9971f0f4bb212ff
font_01_sfnt_off00010e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E28 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off0001198b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198B 10592 bytes
SHA-256: 52b27f6426622e20dad857863ff4de165fa7d858db8ea1ac9fe0e61661038dd2
font_03_sfnt_off00013dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD1 14260 bytes
SHA-256: 79842541dbae7a123bcf59f1f25978e6ada46434457ee4c43cf745f51d895f0b