Malicious PDF — malware analysis report

Static analysis result for SHA-256 57c7fec6c0ab634e…

MALICIOUS

PDF

72.6 KB Created: 2020-12-22 19:41:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d23adab3ca2981fd177d671564d3172 SHA-1: 10c2ca1dbd46e28b819497d65066bf7a9d932e18 SHA-256: 57c7fec6c0ab634e0d3ff8f870a576b96b78b872607895330205df865e1d051b
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains heuristics indicating it is a phishing lure, specifically prompting the user to install a browser extension or update. This is a common social engineering tactic to facilitate malware delivery or credential theft. The embedded URL, while not directly actionable in this context, points to a suspicious domain often associated with malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://traffine.ru/strik?utm_term=android+browser+navigation+bar+bottom PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459163/normal_5fe1b96757b77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466143/normal_5fad7c8b0c43c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414495/normal_5f99e29c5e961.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc507951c8c7413144c7bbc/t/5fcc61c4260a660a6bd20f2d/1607229894289/minecraft_2020_new_adventure_craft_games.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc708a58d6e8c3767c103d1/t/5fcad0648dcc5603bee6e59b/1607127140554/57167376621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eaf2ae5-d7fd-4f2e-84eb-5761cc8a7997/67954635771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a59fc7c-14e1-4ea0-a70a-c67476d9d8f2/63556940381.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/danvers_ma_accident_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/factsheet_laten_maken.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/agreement_paper_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c7f3e83-1c67-4934-a4d5-583559b5d516/95179150472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28dd1a30-d13e-438c-adb3-b527b665f96a/mr_chow_miami_spice_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/recumbent_bike_electric_motor_kit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d100.bin
40e35c33031871833bce986751be131b041b9eec1f92dd161f39f91a8d03987d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD100 5180 bytes
font_01_sfnt_off0000e296.bin
5c937123a0c7ccaa0175666c2ddc731d54b1bb65c8df9faf360646537cdc6396		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE296 10960 bytes
font_02_sfnt_off000107d1.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107D1 4324 bytes

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