Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b68d7dcdf20a188…

MALICIOUS

PDF

79.8 KB Created: 2021-03-24 12:12:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7845d2fadcb4a3beec650f99c9aae9f SHA-1: 12b3c9e7bd87b04eba760a2acea9dffd0bcdbb0c SHA-256: 7b68d7dcdf20a1888a69c3443d8b1811e3faf80b6f95b8d406faac5021a76625
136 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as an external URI pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests potential execution of commands, possibly via embedded scripts, although no scripts were explicitly extracted.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://bologen.ru/award?keyword=rpg+maker+mv+tutorial+pdf
    • http://lnstagram-blue-badge-form.com/biform9nr0.pdf
    • http://akfb.online/chrisfix_car_buying_guideijp5l.pdf
    • https://cdn.sqhk.co/wevujawej/ggiajgk/54684678226.pdf
    • http://everydayy.fun/32861054445p9aca.pdf
    • http://kinemulawaw.sportsontheweb.net/britax_car_seat_base_lock_off.pdf
    • http://kind-insta.site/dujifirojemafawuzobk7eli.pdf
    • https://ramemegu.weebly.com/uploads/1/3/1/3/131383760/3438922.pdf
    • https://legufita.weebly.com/uploads/1/3/4/8/134866723/3546081.pdf
    • https://zipatusuf.weebly.com/uploads/1/3/4/0/134012633/zekaxizevipi.pdf
    • https://labelamujevodit.weebly.com/uploads/1/3/1/6/131606697/837194.pdf
    • http://pearhaidhr.fun/8565638029hcs2i.pdf
    • http://es50off.pro/femom4yycc.pdf
    • http://tujemet.scienceontheweb.net/11936107584.pdf
    • https://nekitunanozot.weebly.com/uploads/1/3/5/3/135346928/lakivutikuve_xexeruzosupisij.pdf
    • http://pirojibanenuzi.getenjoyment.net/59666333708.pdf
    • http://invitesistem.ru/how_to_run_python_scripts_in_powershellxg0ni.pdf
    • https://cdn.sqhk.co/nolugavetiri/UFgizKa/sheet_music_for_handbells_beginners.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dupula/nerawoval.pdf
    • https://s3.amazonaws.com/gewuwasi/navozodaforib.pdf
    • https://s3.amazonaws.com/punagilelabon/fibrous_cement_sheeting_asbestos.pdf
    • https://s3.amazonaws.com/jenisozazewubo/makalah_sejarah_peradilan_agama_di_indonesia.pdf
    • https://s3.amazonaws.com/novipaliwid/advanced_marathoning_3rd_edition_review.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_off0000f80f.bin
883829dd44d82e64fba2cbd5bdc74947b9f7c675cd91f91b56666c9c11315917		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF80F 5316 bytes
font_01_sfnt_off00010a1f.bin
33cdeca64e213e5af2cbbdb8ea6ea6d39a8ff44a56bb11bdec1a5eb14fa8a3dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1F 11620 bytes

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