Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8db2a3cfa34604c…

MALICIOUS

PDF

87.5 KB Created: 2021-06-10 08:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0f62a188e88d8f9bb2147d18ceb098d6 SHA-1: 46a953956bc5b318a6921b6c4ba1a6cb75937fd3 SHA-256: f8db2a3cfa34604cf08503154fc0d502da04595e3e9e4d15d6035af4593806d6
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URL that points to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. ClamAV also detected the file as a phishing trojan. The embedded URL likely leads to a phishing site designed to steal user credentials or deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://midufefew.ru/123?utm_term=2016+highlander+review+consumer+reports PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488102/normal_60285bcb72076.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495684/normal_5fcd562420a4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445531/normal_6069e9e92408d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380219/normal_60bd953db3fd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475588/normal_602cdb2648b22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496582/normal_5fe14926e9c77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409606/normal_6003b66784429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495251/normal_600f7f1706f05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464734/normal_5ff4c5160f1f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412999/normal_602c5f1253c67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_601391d378aef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487918/normal_60314e7edcd49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464525/normal_600bf21ee900f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_603a892a791f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_6023e6fc54384.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485435/normal_600730369d5f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463543/normal_601daedd913db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460266/normal_605eec5d77762.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://funinupun.pbworks.com/f/is_zeus_stronger_than_thor.pdfIn PDF document text
    • http://larabefejaji.pbworks.com/f/descriptive_writing_autumn_forest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17a038ce-a066-475f-8150-f02e688a19f8/hp_officejet_4630_not_printing_from_computer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3355a99-0891-4f94-980f-c236c0806058/how_to_improve_wind_turbine_efficiency.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fa50a5c-d33b-4a34-9e55-981446b3c0ac/9775796034.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/w/file/fetch/144691239/shakira_world_cup_song_waka_waka_mp3_download_pagalworld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a19e240-f3dc-41be-ad43-c0dacb679534/carl_czerny_100_progressive_studies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8853758a-f3bd-4ef9-a4f3-6afe82f76253/otras_maneras_de_usar_la_boca_epub.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_off00011516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11516 6024 bytes
SHA-256: 76df8deae14768aaf73ebe458bc6c58d044f14a9fa0da0c8d156c0dcd5c44b74
font_01_sfnt_off00012986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12986 11360 bytes
SHA-256: 6b1ca4b857f563ab8ebbf54348cfcaca6f8b88a817f88a5c55f9b0f8f5903e2f

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