Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50e634ebe9bbf63…

MALICIOUS

PDF

77.4 KB Created: 2021-03-07 07:42:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea7f6049091c5acb0bd1ad20455d2cd5 SHA-1: 9e14eed72eee5ff7860ac04e28607ebdf93eaa2e SHA-256: a50e634ebe9bbf6309cecfa895e1eb317a2f75f866821053de10b974deca6b0b
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an embedded external URI pointing to a suspicious domain, which is also listed as an IOC. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The document body, though heavily obfuscated, contains text related to a game cheat, serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://midufefew.ru/wix?keyword=cheat+for+star+wars+game+2020+trailer
    • http://watogoda.mypressonline.com/gisubifesonidixegaxug.pdf
    • http://jemulobapamiwu.mywebcommunity.org/auld_lang_syne_lyrics_fast_version.pdf
    • http://gopidap.scienceontheweb.net/how_much_is_a_roadmaster_bike.pdf
    • http://liberum.sportsontheweb.net/tumofixebapefidanefagipi.pdf
    • http://nitiwomifigurod.mygamesonline.org/how_to_read_sensus_digital_water_meter.pdf
    • http://ladunalufim.iblogger.org/78406490013.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/367330c5-3c3a-4319-8a72-8a402f9b19c3/59546175487.pdf
    • https://uploads.strikinglycdn.com/files/a0072fd4-d8ca-4fc3-b7ee-49101d18145b/m2n68-la_rev_5.00_specs.pdf
    • http://voxafizuvukulam.epizy.com/how_do_i_find_my_hp_deskjet_2545_wifi_password.pdf
    • http://dibulorofo.epizy.com/74921172505.pdf
    • https://5d3a3edc-1384-4eb0-a354-174dd54c13aa.filesusr.com/ugd/7f5dc5_bcb47ba88d354c00ad9bfc609306cd9b.pdf?index=true
    • http://savexopuzasi.epizy.com/kuzatudepeduwegete.pdf
    • http://nonavijewiw.epizy.com/54115787932.pdf
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_09a0e827f2bc40a38a93dc619d4598a7.pdf?index=true
    • https://aefb6378-f3ca-470a-b9d2-22936542d087.filesusr.com/ugd/fe129c_e60004f9717b4718912ea0a637e1b7b8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/61d0eee8-f4d5-4c28-bc86-c506038af094/down_the_rabbit_hole_oculus_quest_2_walkthrough.pdf
    • https://uploads.strikinglycdn.com/files/4f9c640b-71d5-4975-a655-d6e661e72843/does_cash_app_have_penny_stocks.pdf
    • http://dukukanakimazup.epizy.com/liftmaster_formula_1_whisper_drive_program_remote.pdf
    • https://989244f3-426d-4557-b4f1-0018dac9047c.filesusr.com/ugd/57c819_61c6c5e139bd494b84f0bec334f8d58a.pdf?index=true
    • https://46ebecaa-9490-439b-bba6-ee77f1a6ca93.filesusr.com/ugd/cee8a1_a6c1a9e3210546889659380e308725d9.pdf?index=true
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_aa7459d6a1d44c1cb8955725c25a4354.pdf?index=true
    • http://rarisirifamawod.rf.gd/vifedizuxigekal.pdf
    • https://32e47638-7206-44c1-ad53-5c6f9176402e.filesusr.com/ugd/e00742_bd70307a6e604881afb4284226647222.pdf?index=true
    • 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_off0000f1c8.bin
923c8bf002861522c94568f1d31167b48607ac4733831c08c436922df850da69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C8 5452 bytes
font_01_sfnt_off00010436.bin
d8a36f23b3f599d38652c630104ceaa8114d89c6425485900b872d07e7b425c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10436 10480 bytes

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