Malicious PDF — malware analysis report

Static analysis result for SHA-256 9624b82d0df90f13…

MALICIOUS

PDF

173.8 KB Created: 2021-04-10 15:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00760b025aa738a082daa089e8f8671f SHA-1: 6d18e7f5833da9a3e2a4be9731a9b7a59b72a825 SHA-256: 9624b82d0df90f1393788e246d363519e82114f0d25d535b9e954b444f80c546
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL, https://jacksth.ru/strik?utm_term=maax+spas+chandler+az+85248, is the primary indicator of compromise, likely serving as a lure for phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URI heuristic point to a phishing or malicious content delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=maax+spas+chandler+az+85248
    • https://cdn-cms.f-static.net/uploads/4491157/normal_60591985190df.pdf
    • https://kokesekodabese.weebly.com/uploads/1/3/4/0/134012443/sozesuw_raviguwenakeg_doxaguzilo_gotiguxes.pdf
    • https://fuviwamirami.weebly.com/uploads/1/3/5/3/135351498/minipavuw_wabul.pdf
    • https://gujibimusexuwub.weebly.com/uploads/1/3/4/0/134042380/07d657068b4.pdf
    • https://cdn-cms.f-static.net/uploads/4417406/normal_5fdbfb2919c6a.pdf
    • https://static.s123-cdn-static.com/uploads/4419630/normal_5fcf89f0d3d19.pdf
    • https://static.s123-cdn-static.com/uploads/4446924/normal_5fe41fd458daa.pdf
    • https://mokaredoraxo.weebly.com/uploads/1/3/4/0/134095924/zaxuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/05bec749-2cf1-447f-9f51-cad7dc5ca8ae/asp.net_interview_questions_and_answers_for_2_years_experience_download.pdf
    • https://uploads.strikinglycdn.com/files/6e4e379a-211d-4222-964a-2420433b7b59/serta_motion_essentials_iii_adjustable_bed_base.pdf
    • https://s3.amazonaws.com/kujesulad/99035983117.pdf
    • https://uploads.strikinglycdn.com/files/58748d27-3b76-47d7-a038-8e8935a876c7/focusrite_scarlett_2i2_ableton_live_lite.pdf
    • https://s3.amazonaws.com/popisiburewixuj/wufetisigevivok.pdf
    • https://s3.amazonaws.com/najubu/16332374069.pdf
    • https://s3.amazonaws.com/niporofez/disney_cars_3_coloring_pages.pdf
    • https://uploads.strikinglycdn.com/files/f12f9623-02e5-4684-b3e4-714adbf05264/recover_facebook_password_without_email_or_phone.pdf
    • https://s3.amazonaws.com/vidadaviwal/merujiwoposufatuvo.pdf
    • https://uploads.strikinglycdn.com/files/52058a3e-e1c3-43be-a283-1e8779854361/74207220950.pdf
    • https://uploads.strikinglycdn.com/files/69820753-381c-4568-b5d6-f47afedb8b7d/gerusolikeposoto.pdf
    • https://s3.amazonaws.com/libowebujakux/operating_system_not_found_vmware_mac.pdf
    • https://s3.amazonaws.com/wazorixekunafob/how_do_you_play_baseball_in_darts.pdf
    • https://s3.amazonaws.com/tokit/fifty_shades_of_black_rotten_tomatoes.pdf
    • https://uploads.strikinglycdn.com/files/37d6869c-01f3-4eee-8971-a56f1e3fcfdd/6762241924.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_off00026426.bin
677b78a3dab2037a97002b08141b0de8836b72e44fd6958fa7feea7531b72aee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26426 5824 bytes
font_01_sfnt_off00027809.bin
84daf345e21b08075a6e329eeacb0a13a0447ddcc3efc64e98a9a4ab9c6a9d9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27809 1936 bytes
font_02_sfnt_off0002814a.bin
110c98b967038c3ded51f8c438f34578bfe3490b6c1471d0421d2fab8315017d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2814A 11448 bytes

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