Malicious PDF — malware analysis report

Static analysis result for SHA-256 c33926a0390521e6…

MALICIOUS

PDF

84.0 KB Created: 2021-05-30 12:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d5799c9805ce88af06ccc40815d7ec2c SHA-1: 2d5dd3ccc6e039554ae09535d8efea9da3613229 SHA-256: c33926a0390521e6346213fcdf8becd4e49b87489545a246886736d7dc7fab48
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=nursing+assessment+form+for+home+care PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485004/normal_600ac67e342eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383300/normal_606590e66bf51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410018/normal_6039aa5b2ff02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445737/normal_600d47d416ef3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374519/normal_5fe5df572dec2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483610/normal_6022cf8983605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_60319a6232b8f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/83bc6398-15dd-4cc9-a6e1-bf4bae9edada/4387760963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/472b9dbb-95d0-4ce5-9dee-ba070ec439ba/13891442968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcb9bc11-66b8-471f-b58c-794c5f9e1bad/lazobilexase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e19e43c3-fbf5-4d4a-833a-0e2303fd7a1c/what_are_the_3_reactions_of_cellular_respiration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56564575-4533-4a68-a864-65c8a430b4fb/how_do_i_connect_my_bluetooth_headphones_to_my_polk_soundbar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61545c1d-8776-4e10-89f4-609386edf198/67186170749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78612740-34bf-4338-b279-401afe3d6024/jivuwodujulim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b383995-68ca-48a8-8dfa-be8fcec4eb43/ya_nabi_salam_alayka_arabic_video_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2365749-5aaf-4fe9-8fa9-694d87d92818/price_action_trading_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8afb229-3792-4439-9c30-a907f14d8843/pebugavameludefinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59d674d4-656c-4cdf-92f4-d339e253cd32/what_is_the_difference_between_solvation_and_heat_of_solution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c36e8de1-7ddc-4312-b9c9-b4392e4a3ad6/quran_arabic_to_english_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d802ef1-5d9a-4447-8e6d-a8247b5d8b7c/how_to_reset_2012_toyota_camry_maintenance_light.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC5 5232 bytes
SHA-256: 090e129fd47d07002eef5fb16c4b3c28fd443c3ec632c97859d5884ca25a870a
font_01_sfnt_off00011d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D70 11060 bytes
SHA-256: bffce44521e2fe6e02d836b8fa0270e1109e906800c45d9cf9e3ea3bf7ea37a4