Malicious PDF — malware analysis report

Static analysis result for SHA-256 c384bd34f8688638…

MALICIOUS

PDF

87.7 KB Created: 2021-04-06 17:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 174d5f31f54d27948086a65598a65bf1 SHA-1: e1c608b6b88b03e0b525777c1c7b8824ff7b6837 SHA-256: c384bd34f8688638feb77c855d9a2ab612e49b0c09afbcd4b6c1f61a2ce45e71
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File Execution: User Execution T1059.007 JavaScript

The file is a PDF that has been flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The 'SE_CLICKFIX' heuristic specifically points to a social engineering attack where the document instructs the user to execute a command, likely to bypass macro restrictions and download a secondary payload. The embedded URL is a strong indicator of the download source.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://lozipotod.ru/strik?utm_term=edit+text+in+paint.net
    • https://cdn-cms.f-static.net/uploads/4485930/normal_6048c512cf720.pdf
    • https://cdn-cms.f-static.net/uploads/4467322/normal_600e5271097b5.pdf
    • https://cdn-cms.f-static.net/uploads/4447912/normal_600fe7795c620.pdf
    • https://cdn-cms.f-static.net/uploads/4455660/normal_6056e8c8c6507.pdf
    • https://cdn-cms.f-static.net/uploads/4445125/normal_604bbb09908c5.pdf
    • https://cdn-cms.f-static.net/uploads/4380082/normal_5fd1d6fc8eb68.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/be19967a-1c43-4fb9-a879-0b7c7d150c1a/how_to_manage_a_team_as_a_team_leader.pdf
    • https://s3.amazonaws.com/gewuwasi/riluruzelupovigowi.pdf
    • https://uploads.strikinglycdn.com/files/6f01e2b9-695b-4538-b847-a501f6897fdc/30494953699.pdf
    • https://uploads.strikinglycdn.com/files/a98c9d86-7564-495e-a60e-2abcdf7486a5/pixma_mp240_driver_download.pdf
    • https://uploads.strikinglycdn.com/files/283a75b9-3cd6-4a87-b2f6-d24059ed64cb/68478761534.pdf
    • https://uploads.strikinglycdn.com/files/842d38b4-1f4c-4a01-a1c4-d2e13df0dbd1/jovujalojajaziki.pdf
    • https://s3.amazonaws.com/badodemebo/60274544646.pdf
    • https://uploads.strikinglycdn.com/files/7c87351f-7064-4cf7-9d90-e9d457249579/torajala.pdf
    • https://uploads.strikinglycdn.com/files/80cd58d8-c491-49ed-b4d9-2353ef52f587/what_is_pmi_capm_certification.pdf
    • https://s3.amazonaws.com/kufazete/common_core_standards_ela_grade_3.pdf
    • https://uploads.strikinglycdn.com/files/79c7801c-7daa-452d-9617-b452adfa6419/amazon_prime_z_the_beginning_of_everything_season_2.pdf
    • https://s3.amazonaws.com/petubapizo/wowezefirevikisenulilemej.pdf
    • https://s3.amazonaws.com/minaxigevani/pepelalilapafemu.pdf
    • https://uploads.strikinglycdn.com/files/55969ceb-8f19-4d04-b1a9-715ef75abb37/wayne_dalton_garage_door_spring_tension.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_off00011ab7.bin
2ffab2600868e7287b55ff2cbf5f1be25340cb13f9e41eec7172b578aceca107		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB7 4704 bytes
font_01_sfnt_off00012ad4.bin
2d3ce2933e625bef57c8cc4edf7453bd0e0968dcd0cabe1720fda08162f2f6c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD4 11444 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.