Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe26f099419433e…

MALICIOUS

PDF

75.8 KB Created: 2021-02-14 14:13:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 229987e99956e245e4d252f9460aee8a SHA-1: 3a11efbb4ff66550a1f09520188625ab2640b426 SHA-256: ebe26f099419433ede89522a8704c97fc9c001573f76454c9fec1c548a4bd86e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to host or link to malicious content, potentially leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/wix?keyword=arcgis+manual+ppt
    • https://vavetoros.weebly.com/uploads/1/3/4/8/134854671/4771537.pdf
    • https://static.s123-cdn-static.com/uploads/4380699/normal_5fc9936266402.pdf
    • https://cdn.sqhk.co/kimefutif/idaa0jh/xuzofafaromimo.pdf
    • https://cdn.sqhk.co/wavivatus/UcgeETw/lenovo_laptops_thinkpad.pdf
    • https://zabapekiji.weebly.com/uploads/1/3/4/4/134470890/manezupowiku.pdf
    • https://static.s123-cdn-static.com/uploads/4497697/normal_5fcc049c99d02.pdf
    • https://cdn.sqhk.co/wavefekus/SjehboN/kugufewezakuwabotegibis.pdf
    • https://cdn.sqhk.co/totafeta/ojahfSh/easy_homemade_black_bean_burger_recipe.pdf
    • http://pikogoxo.iblogger.org/multiplying_dividing_rational_numbers_worksheet.pdf
    • https://cdn.sqhk.co/buruvalufe/igKieih/95604918816.pdf
    • https://cdn.sqhk.co/lenufetimop/Yujagjb/rowugoxan.pdf
    • http://tesepaxe.iblogger.org/30120769382.pdf
    • https://bobilemako.weebly.com/uploads/1/3/4/7/134733435/legelibif.pdf
    • https://cdn.sqhk.co/xolovagi/himjhgh/blaze_monster_truck.pdf
    • https://cdn-cms.f-static.net/uploads/4474736/normal_60105569608ce.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zegokufa.epizy.com/java_windows_7_professional_free.pdf
    • https://s3.amazonaws.com/pazerogasarinu/44647074303.pdf
    • https://s3.amazonaws.com/gopuze/bengal_tiger_movie_tamil_dubbed_free.pdf
    • https://s3.amazonaws.com/webipejonavuv/siwunotad.pdf
    • https://s3.amazonaws.com/kegubinefuda/81087766285.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec89.bin
13be4867c9932c24a4cbc268abb0152b8010a72d072a32cb343a5e8a5d9a37de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC89 5244 bytes
font_01_sfnt_off0000fe4a.bin
14d174388bd0843a87d97d0be1c741ffc45fda3af4392d77d7b7dd4865299c04		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4A 10412 bytes

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