Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8428016b61bffae…

MALICIOUS

PDF

72.8 KB Created: 2021-02-10 01:52:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d94eee99b6e47c653ac5a9c1214eae6f SHA-1: ee59a8e40cf6a47f418f7f001d3fde4459a42071 SHA-256: c8428016b61bffaeafc6342eae6095b1d065d5ba02373ce68d0a93f8c297c328
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, such as 'https://bologen.ru/wb?keyword=cot%20bed%20sheets%20argos', suggests the document is designed to redirect users to potentially harmful websites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are commonly used in phishing campaigns to trick users into downloading further malware or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wb?keyword=cot%20bed%20sheets%20argos PDF link annotation
    • http://cardioactiveitalia.site/66076585880xsini.pdfIn PDF document text
    • https://cdn.sqhk.co/nupasoxure/gfjiaCM/telowaru.pdfIn PDF document text
    • https://cdn.sqhk.co/pobusafi/Hgigggg/34464492563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368224/normal_600a5177f1a7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374203/normal_5fc8f1375aafc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475565/normal_5fd7855fc6483.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/dhiKgha/48473045660.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393486/normal_6007faa62b6f7.pdfIn PDF document text
    • https://cdn.sqhk.co/feziwetesene/gcqhdMt/polar_coordinate_plot_in_matlab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414515/normal_5fff2e3502014.pdfIn PDF document text
    • https://cdn.sqhk.co/fajoliteve/SGifU7r/sasovep.pdfIn PDF document text
    • https://cdn.sqhk.co/kugorazig/2pihkie/pen_and_paper_rpg_for_2_players.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikebepo/hQKjjji/among_us_all_skins_free_pc_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bifugudawesu/SghdPK1/61950627069.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/robumuduluwise/77644925631.pdfIn PDF document text
    • http://jubalagifagusop.epizy.com/17455499361.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/crack_backuptrans_android_whatsapp_transfer.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_off0000e016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE016 5100 bytes
SHA-256: 1c08d615e3da9aa01a7f824814cd67b8f33ae465f064101f57a2fd2154eb9373
font_01_sfnt_off0000f15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15D 10888 bytes
SHA-256: 045d3ac1525eaccab7bd07a8a9586519b7c0da7cc00d8852671d69101c78f2b4

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