Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc496b0865110007…

MALICIOUS

PDF

81.2 KB Created: 2021-03-06 00:18:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c59a7ae7bc09fd6ffbd33de10685da4c SHA-1: afc2ba00d7578973431777a02d5ae4a90bd4218f SHA-256: fc496b0865110007dadc542eb3af51ace03f194f46771401595270dd3dcdb5d6
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs suggests an attempt to redirect the user to external malicious content, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains metadata related to PDF creation, which is consistent with a malicious document designed to appear legitimate.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/wix?keyword=data+structures+and+algorithms+in+java+pdf+6th+edition
    • http://copyrightshelpcenter.com/ditizoliduwuvi7ptw1.pdf
    • https://cdn.sqhk.co/duburijudi/cvODhaB/play_klondike_solitaire_games_free_online.pdf
    • http://vibuluvizawo.66ghz.com/satie_gnossienne_no_5_sheet_music.pdf
    • http://italywow.pro/healthy_and_unhealthy_food_activity_sheetu53nf.pdf
    • http://swiss-gear-top.xyz/star_wars_novels_timeline_2019al00z.pdf
    • http://prizinsta.info/somewhere_over_the_rainbow_sheet_music_voice_and_piano_free6gm1h.pdf
    • http://trysucre.pro/hermle_clock_parts_australia3vejl.pdf
    • https://cdn.sqhk.co/pemoxeriko/Ljitihk/86091229830.pdf
    • http://walkover.me/eerie_2019_parents_guide3xtw1.pdf
    • https://cdn.sqhk.co/faserekino/jj1LUha/54637749632.pdf
    • https://cdn.sqhk.co/sivadapexiri/ggdpUYr/1675342396.pdf
    • http://power-guard.shop/56241674481eljv9.pdf
    • http://tulinejifuwo.22web.org/oracle_select_case_when_then_else_end.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/02ab1299-f7c7-47cc-84cf-bd21b94e3d20/new_testament_vs_old_testament_god.pdf
    • http://fasewevabudumu.epizy.com/jowonapimibizawuvab.pdf
    • https://uploads.strikinglycdn.com/files/5bf11eae-8684-41da-b938-6f8e00850e95/vajisakifimofiguro.pdf
    • http://botibaxar.rf.gd/letter_from_santa_free_templates.pdf
    • https://uploads.strikinglycdn.com/files/a1791244-6990-4f72-a622-f08aa5c1a85e/74900083383.pdf
    • https://uploads.strikinglycdn.com/files/97f02327-8e76-448a-81f4-c1e263224028/44695192973.pdf
    • https://uploads.strikinglycdn.com/files/0152d7f1-2b32-4d97-a2ae-0df3f3da58d3/93710241883.pdf
    • http://kixomeremit.epizy.com/zifasogefafufobosareti.pdf
    • https://uploads.strikinglycdn.com/files/f842a33f-3502-475d-ae9a-94fac0e4630b/zofogajin.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_off0000ffab.bin
feac2d742e01556dd72570e3e7bc78f5bca5fb1f3f732c4858a8d0599cb405e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAB 5860 bytes
font_01_sfnt_off00011384.bin
9d997d9da2c91bb0a853753d0b6a98f17eb736e0c106c2ed2ff4586b628950a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11384 10512 bytes

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