Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3a2a689e3b89f8…

MALICIOUS

PDF

74.1 KB Created: 2021-02-28 01:16:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6a41a57216daf67ddf528f239246bd44 SHA-1: 13adb013e610ebe65b05a8ef22419312eddfa9dc SHA-256: 2a3a2a689e3b89f8b8bf8e4ac6084f47e59521c28c976b9ddaa4694f7145f08b
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV and ML classifiers as malicious. The document body, though heavily obfuscated, suggests a lure related to a book review. The presence of an external URI and the overall detection by security tools indicate a phishing attempt to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=the+revised+fundamentals+of+caregiving+book+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369525/normal_6039a85adee48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476750/normal_5febcea5999c7.pdfIn PDF document text
    • https://cdn.sqhk.co/gojogefe/Qjee1Ko/cobb_10_theatres_in_winter_haven_fl.pdfIn PDF document text
    • https://cdn.sqhk.co/jibenapola/Esge5hf/bukuvurikixiwov.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/tZUMjcX/in_the_rooms.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446379/normal_5ff9b8224e588.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365638/normal_5fdda43567732.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/IojeZjc/colortry_skull_and_tattoo_coloring_page.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/bEtXvFE/83792685765.pdfIn PDF document text
    • https://cdn.sqhk.co/sepagumal/iO6cicE/93405073303.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jagux/practice_math_worksheets_for_4th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/auto_sheet_metal_fabrication_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/lemagebisoziges.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/16775111901.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/cabin_crew_resume_format_for_freshers.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/pijowogosojirize.pdfIn PDF document text
    • http://budaboz.epizy.com/16217326735.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/inverse_of_functions_zen_math_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/counting_money_math_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/alkaline_plant_based_diet_aqiyl_aniys.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/28815295056.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_off0000e46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46A 5740 bytes
SHA-256: 7cbad3fcd9d86193559dc8e00a60418d4fcd7eb7fb68316e71ce684b34844755
font_01_sfnt_off0000f7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DC 10196 bytes
SHA-256: 3b1ee8e2a307d388b7749a7ea99daf85e919dde84164f6d451c8be21150058da

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