Malicious PDF — malware analysis report

Static analysis result for SHA-256 18a55eccae188539…

MALICIOUS

PDF

82.3 KB Created: 2021-03-23 08:24:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 569d40c807ab8a0907cfc9419913ecbe SHA-1: 75395074f35b68b0d2764ced9334d2ca15852530 SHA-256: 18a55eccae188539bee49cf76d951ca8287d89cb64b4c3ab812c1faf999305a4
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that mimics a search result, likely to trick users into downloading malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of numerous suspicious URLs suggests a phishing or malware distribution scheme.

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://golowaki.ru/award?keyword=principles+of+algebraic+geometry+pdf+download
    • https://cdn-cms.f-static.net/uploads/4373987/normal_5fd63ad0d92b1.pdf
    • https://cdn.sqhk.co/tuzukada/7d5B7jj/82108535608.pdf
    • http://bigchance.pw/pool_party_invitations_templates_free_printablec90of.pdf
    • https://cdn-cms.f-static.net/uploads/4459034/normal_6031bd773aefc.pdf
    • https://cdn.sqhk.co/zifibikom/Xiahi0T/bakobovisaramamezuxel.pdf
    • https://cdn-cms.f-static.net/uploads/4384831/normal_600d1daad4991.pdf
    • https://static.s123-cdn-static.com/uploads/4460963/normal_5fc8b7cee2112.pdf
    • https://cdn.sqhk.co/posojuvapono/Eyhhuif/24874469484.pdf
    • https://static.s123-cdn-static.com/uploads/4447433/normal_5feb6b4ad963d.pdf
    • http://kyukty68.xyz/10406451570ggo5x.pdf
    • http://bighome.space/mekixidapakopidon98z5.pdf
    • http://gnatural.space/sidekuvont1src.pdf
    • https://cdn-cms.f-static.net/uploads/4393348/normal_604c99890c281.pdf
    • https://cdn.sqhk.co/zaxuloxedu/aWknZhj/world_of_warships_games_for_pc.pdf
    • https://cdn.sqhk.co/tapuvimixaxo/gheievS/robux_generator_get_your_free_robux.pdf
    • https://cdn.sqhk.co/mipekakiri/a5hKhkK/83785766886.pdf
    • https://cdn.sqhk.co/bopelara/ificFn7/beer_flight_boards_for_sale.pdf
    • https://cdn-cms.f-static.net/uploads/4367622/normal_605949444f8ff.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://s3.amazonaws.com/novipaliwid/46322555040.pdf
    • https://s3.amazonaws.com/viboxikuz/mamivurob.pdf
    • https://s3.amazonaws.com/natewared/29505494456.pdf
    • https://s3.amazonaws.com/zalomi/field_trip_report.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f2.bin
1134e305adfb70f82c3db4e656a24e111c74455cebf141a2cd002d6a2c505108
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F2 5808 bytes
font_01_sfnt_off0000fdb3.bin
14f74dd9158fc3c87ecdb982b1b1d100deb94891eba9afbe7901b96a8e7ab84e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB3 10928 bytes
font_02_sfnt_off0001230d.bin
c6d07f7a6c03dc57bd2b4f0180c0b4cfe35c3014cae4412f010804d281d11db4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1230D 7068 bytes