Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9bb97c19173b67…

MALICIOUS

PDF

76.0 KB Created: 2021-02-17 11:35:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c94bffd65a40052e1bc6fabdd1f476af SHA-1: 2865ec852ca867dfc1c395d6952ed522846f26fc SHA-256: fb9bb97c19173b67b70bc78b725d4de555b109200a95b4afe5adbda2d47a2404
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'bologen.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into downloading further malicious content.

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://bologen.ru/123?utm_term=gluten+free+ideas+for+school+lunches PDF link annotation
    • http://tuimag.ru/tujedukoparuvekeqjiri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413456/normal_6007fe563db6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461767/normal_600c89bdf2913.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/jXhcATh/wuzeke.pdfIn PDF document text
    • https://cdn.sqhk.co/romumoxoleno/aTu7Jjf/share_files_via_cloud.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/gbicEib/60394254079.pdfIn PDF document text
    • https://cdn.sqhk.co/dasekizob/fwZjduu/download_last_day_zombie_survival_mod_apk_terbaru.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxogubajo/giVdiiC/primary_school_teacher_cover_letter_sample.pdfIn PDF document text
    • http://brumbum6.xyz/how_to_do_probability_on_ti_84_plus79gb1.pdfIn PDF document text
    • http://fruits-summer.fun/learn_python_scriptingx7hzy.pdfIn PDF document text
    • http://radanews.site/peterson_stress_concentration_factors_charts1gexi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_601c8e819dcc7.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/xuzed/fragile_states_index_2018_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/15533909706.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/pudetadenobuledafoma.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/neo_bomberman_pc_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/brooklyn_colm_tibn_analysis.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_off0000ecae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAE 5140 bytes
SHA-256: 67248f9e0055c8b7996ec234b56ca5f9b5e19cb83df8771b227fd52f5600899c
font_01_sfnt_off0000fe23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE23 10888 bytes
SHA-256: 2d5b7fba3f41d936713178c5d27e16a0dfdb44dbebb5a47756e75aadb6c5e8cb

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