Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1818d6bb641e91d…

MALICIOUS

PDF

77.6 KB Created: 2021-03-28 05:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afe9912ac46692b66b4b813e98cce4d2 SHA-1: 9fe1205e093620ade70ec44c10abbdb05f6425fb SHA-256: e1818d6bb641e91df419fff8efe4bb0aea5dfe958419ea098971d9124ba17453
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains embedded URLs that lead to potentially malicious PDF files, disguised with keywords like 'physics book'. The presence of external URIs and numerous embedded URLs suggests an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/award?keyword=physics+book+9th+class+punjab+textbook+board+pdf
    • http://life-news.tech/the_signal_man_story_download3v2xo.pdf
    • http://ru-en.xyz/resonance_repatterningc4sq1.pdf
    • http://lovelyhouse.online/learn_spoken_hindi_online_free_through_english9fsp2.pdf
    • http://tonagruz.ru/nfl_week_7_predictions_2018_bleacher_reportcoyzu.pdf
    • http://reduslim-sito.site/vumatanezibmho2p.pdf
    • http://pitushok.fun/computer_science_an_interdisciplinary_approachb9fyk.pdf
    • https://cdn-cms.f-static.net/uploads/4471688/normal_5fda8e6abaf7d.pdf
    • http://totalcreditcheck.info/rising_of_the_shield_hero_season_2_anime_planetvvcuh.pdf
    • http://flash-sar.online/xutisexapozunirutupqfjic.pdf
    • http://djami.ru/remejewexej4xl93.pdf
    • http://goldstein.berlin/journey_to_the_center_of_the_earth_2_movie_castwr8o1.pdf
    • http://badge-verification-center.com/51296735327erfku.pdf
    • http://lnstagram-blue-badge-form.com/twilight_saga_breaking_dawn_part_2_book_endinguc4dv.pdf
    • http://matras-24.ru/medewawuvanqux84.pdf
    • http://reactivaperu-2020.com/manual_123d_design_espaolgp9yf.pdf
    • https://cdn-cms.f-static.net/uploads/4464722/normal_604d9bbe19e28.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sobakijej.rf.gd/gimudadowalufaz.pdf
    • https://s3.amazonaws.com/vukumesoj/digufaxorusekumorewagasef.pdf
    • http://sujosivetobifir.epizy.com/27409880789.pdf
    • http://wofelekupobepo.epizy.com/zexogikezelowi.pdf
    • https://s3.amazonaws.com/fopalew/best_introduction_to_calculus_of_variations.pdf
    • http://kanisal.epizy.com/bank_of_america.pdf
    • https://s3.amazonaws.com/tetofamuxulil/wahl_pro_series_clippers_for_dog.pdf
    • http://zaxutakizet.epizy.com/pizopubawuliwela.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f047.bin
3f0a18946c25c9b41ba138a650c45c95abe4b1c0e9271b4092d590dd2c870675
pdf-font-stream PDF embedded font (sfnt) at offset 0xF047 5848 bytes
font_01_sfnt_off00010438.bin
aac87752deadb51d544ad30b133b7b707a8c72cf801472a941d54614767cd935
pdf-font-stream PDF embedded font (sfnt) at offset 0x10438 10712 bytes