Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ade8c9b98814b3…

MALICIOUS

PDF

81.0 KB Created: 2021-05-10 15:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c9154a9376df35f3a0ef92074519166 SHA-1: beaee683a32debc8b518a77c9025880c2460d6d8 SHA-256: 45ade8c9b98814b3e96cd6663b26135ea44df2f9d69926471bed026942dedba8
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The 'SE_CLICKFIX' heuristic suggests a social engineering attack where the user is prompted to run a command, likely to download and execute a secondary payload. The embedded URL is a potential indicator of compromise.

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
  • 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://maypoin.ru/strik?utm_term=acer+veriton+desktop+no+display
    • https://cdn-cms.f-static.net/uploads/4485927/normal_6068575d25ba9.pdf
    • https://static.s123-cdn-static.com/uploads/4497358/normal_5fd076541e180.pdf
    • http://gizovivomiz.getenjoyment.net/93958955201.pdf
    • http://lupuneruw.iblogger.org/90730613579.pdf
    • http://zokugorevat.mywebcommunity.org/mechanical_engineering_colleges_in_new_york_city.pdf
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5fdc1adba006f.pdf
    • http://givimemaregudum.sportsontheweb.net/xafipujubenururusomar.pdf
    • http://taxiralimivi.iblogger.org/how_to_block_your_knitting_project.pdf
    • https://cdn-cms.f-static.net/uploads/4391909/normal_6038c755e196c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/f2f42334-4b25-410c-9d70-91d4da89a281/how_to_unlock_the_kenmore_elite_dishwasher.pdf
    • https://uploads.strikinglycdn.com/files/cafd173a-b49a-470b-8add-a491a0df1213/fallout_4_map_size_vs_gta_5.pdf
    • https://uploads.strikinglycdn.com/files/06e7b06d-6244-4605-9f95-d524308543c4/how_to_make_a_mini_comic_book_step_by_step.pdf
    • https://uploads.strikinglycdn.com/files/3804a4df-72dd-4144-a8c7-88de81ca676e/37763570062.pdf
    • https://uploads.strikinglycdn.com/files/5f13c893-a398-4a44-9e8b-367a127eef6f/3048189399.pdf
    • https://uploads.strikinglycdn.com/files/4622275d-ea4b-4ee4-966c-87b42aa06cd6/what_to_eat_to_get_body_in_shape.pdf
    • https://s3.amazonaws.com/bejeseja/42499559462.pdf
    • https://s3.amazonaws.com/xapijifas/careen_verb_form.pdf
    • https://s3.amazonaws.com/kabisebax/vasepesutanivolub.pdf
    • https://s3.amazonaws.com/buponuwebi/wekuzuvivapukuluvelag.pdf
    • https://s3.amazonaws.com/davolazupivowi/27982166962.pdf
    • https://uploads.strikinglycdn.com/files/779c8ac2-1f0c-400f-91e7-22e0f2b7d156/frosty_the_snowman_games_online.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_off0000f123.bin
53d117e52b90bfa51264e7be6a494d24ee17d56c25fbe2d6f1c192aca0fd765d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF123 5072 bytes
font_01_sfnt_off0001026f.bin
196d3c8a74c0b578dbf40c6898768fc0c60efabb0d0b7cef55daba3f8dff3806		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1026F 11176 bytes
font_02_sfnt_off0001286f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1286F 4324 bytes

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