Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6b70466862305ea…

MALICIOUS

PDF

78.1 KB Created: 2021-03-10 23:24:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 452a4d3d161cb4f3e77c8dcaab0c8500 SHA-1: e9c8163eb0dfb2b3ac34fb7c3ddafd45fa5bdef5 SHA-256: b6b70466862305eaf74cd0baf385f25a2d890a292a220be1658bbc87fe74e5fd
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'jacksth.ru', which is likely used to redirect the user to a phishing or malware download site. The document body is heavily obfuscated, but the presence of PDF_URI and EMBEDDED_URL heuristics confirms the attempt to leverage external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/wix?keyword=ewok+plush+toys
    • https://cdn.sqhk.co/sevigexew/Fhiid1k/43846658909.pdf
    • https://cdn-cms.f-static.net/uploads/4393779/normal_6013ab3c0be05.pdf
    • http://lufafemazivug.iblogger.org/aquaman_wallpaper_hd.pdf
    • https://cdn-cms.f-static.net/uploads/4415326/normal_600eb0690a926.pdf
    • http://kubuvifabitowib.iblogger.org/minijevoga.pdf
    • https://static.s123-cdn-static.com/uploads/4470685/normal_60054d39c545a.pdf
    • http://gadetebes.sportsontheweb.net/74991535503.pdf
    • https://cdn.sqhk.co/towinomer/3hfNQjf/best_teenage_mutant_ninja_turtle_comics.pdf
    • http://gimemuwet.mypressonline.com/80597012266.pdf
    • http://tevaruv.sportsontheweb.net/pojab.pdf
    • https://cdn.sqhk.co/roretuduva/agdhcja/easypay_metrocard_account_number_location.pdf
    • https://static.s123-cdn-static.com/uploads/4467573/normal_5fe22fe645b6e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zafijukopa/queen_mab_chariot_drawing.pdf
    • https://s3.amazonaws.com/nijudow/kedapegobowufobavukuguwo.pdf
    • http://mawarine.epizy.com/uc_browser_for_windows_8._1_pc.pdf
    • https://uploads.strikinglycdn.com/files/ef0d3bfe-57fd-4086-a431-8f29ee04a59a/how_to_unlock_door_on_whirlpool_washer.pdf
    • http://favigawesuwevo.rf.gd/bokavitiputidifufarepulot.pdf
    • https://uploads.strikinglycdn.com/files/51b43b9a-614a-4237-95bc-caf35b0a8a3f/vedevo.pdf
    • http://nedenapurolaket.rf.gd/gobelifoveliju.pdf
    • https://uploads.strikinglycdn.com/files/d559909d-c40b-40b9-ad05-aae49517686e/twilight_saga_3_full_movie_download_in_hindi_480p.pdf
    • http://tososite.onlinewebshop.net/rubibirakovipejunosulola.pdf
    • https://uploads.strikinglycdn.com/files/2e5841e3-2245-49e7-9ed2-31ac6ad6af67/29956347656.pdf
    • https://uploads.strikinglycdn.com/files/c9d7ab18-7e54-4379-950b-0405ff14b16f/48991372219.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_off0000f6fd.bin
7513d67cd4f7bdaa0d97c653c36f54ba56e0ac8bc1b2e3e861422b56569fff3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FD 4816 bytes
font_01_sfnt_off00010780.bin
b80b9a25ecbe27ab04e6a76e23c3f98d70d3d6cf3dd7cc2a0ff7d7e9a8421f77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10780 10340 bytes

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