Malicious PDF — malware analysis report

Static analysis result for SHA-256 0001afefcb1b3923…

MALICIOUS

PDF

77.8 KB Created: 2021-03-12 21:00:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49a6a2d5b525cf660e9da1ca71089b08 SHA-1: e6da838b04a88768dadc11b7ab5feef2c65948ef SHA-256: 0001afefcb1b3923e650380b11ee9fdef94188dc5ec3d17661b045d21d23d492
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that directs the user to a suspicious URL, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a school name, suggesting a targeted phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/wix?keyword=glenbrook+middle+school+concord
    • https://cdn.sqhk.co/xonudutixova/eIifdmL/43738845294.pdf
    • https://cdn.sqhk.co/tenokesime/JWaZkhi/nail_art_supplies_for_beginners.pdf
    • https://cdn.sqhk.co/wevafixap/hOijjij/escape_plan_2_imdb_parents_guide.pdf
    • http://dulexip.22web.org/49281244219.pdf
    • https://cdn.sqhk.co/sunomedude/br4pmcd/dijutegisodapolemafuvafet.pdf
    • https://cdn.sqhk.co/zejejofe/wojgjjf/gadipujupexovaxiboxil.pdf
    • https://cdn.sqhk.co/xonafelog/iYP7zib/86437780920.pdf
    • https://cdn.sqhk.co/ninulekuto/YLichhe/bixowogudumifajonalas.pdf
    • http://gesaribenufemi.iblogger.org/11985590833.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gepikadagutuv.epizy.com/nefepifululifisegatujumud.pdf
    • https://s3.amazonaws.com/jowutoneranemuk/sample_eeo-_1_component_2_report.pdf
    • https://uploads.strikinglycdn.com/files/31451bbc-403e-47ae-8b65-77f86596d27f/breakfast_at_tiffanys_book_cover.pdf
    • https://uploads.strikinglycdn.com/files/159f42d0-5fe6-4ffe-b993-e1bdf737b782/dewalt_dw708_home_depot.pdf
    • https://s3.amazonaws.com/tipikaxe/84178474792.pdf
    • https://s3.amazonaws.com/xeroguru/badlapur_movie_bluray.pdf
    • https://s3.amazonaws.com/fevobelijogal/lp_jantung_koroner.pdf
    • https://s3.amazonaws.com/mekonulegipero/probability_theory_and_mathematical_statistics_fisz.pdf
    • http://zakidodirof.epizy.com/duraheat_kerosene_heater_home_depot.pdf
    • https://s3.amazonaws.com/vaxebisapesi/miss_universe_2017_question_answer_round.pdf
    • https://uploads.strikinglycdn.com/files/637fd959-d3be-4081-8c25-150981526ec4/mitusadokiraponozum.pdf
    • https://s3.amazonaws.com/jixerubowi/odia_song_free_for_mobile.pdf
    • https://uploads.strikinglycdn.com/files/fd4bb1d1-cfe4-409a-b5f3-25ecccf1320d/how_do_i_find_my_nas_on_my_network.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_off0000f3d4.bin
ba0dbf0dfc02cbc996c72cfd49e01191dee43a0ee5df5cb800448cfe69db53a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D4 5204 bytes
font_01_sfnt_off0001055c.bin
a063b6b79b6ca38e1a335b473c15f60e956a73f5923fffbbf1cde9b6de5b2a73
pdf-font-stream PDF embedded font (sfnt) at offset 0x1055C 10624 bytes