Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f82072586920b38…

MALICIOUS

PDF

81.7 KB Created: 2021-02-19 04:44:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3a5b57261f34617517c6d139d2e5b39c SHA-1: 70753e9fc797758e299f3f510209d0e156ad27d8 SHA-256: 4f82072586920b38f8303d8673dd396a47f9947fcff9c611156d1c4e8e1d0e87
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'baarspo.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to contain keywords related to printer setup, suggesting a social engineering pretext to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=how+do+i+set+up+epson+wireless+printer PDF link annotation
    • http://kodimovizi.22web.org/64384594208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467306/normal_6012e8d4d9b95.pdfIn PDF document text
    • http://free-at.pro/choose_the_right_answer_to_these_questionsx1hir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489404/normal_602905822fc0e.pdfIn PDF document text
    • http://belldiscount.ru/numerologia_cabalistica_emcf0ui.pdfIn PDF document text
    • http://kigenavozos.iblogger.org/deviant_discoveries_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419846/normal_60021e14ebfca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/d_d_sword_bard_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/multiplication_worksheets_2nd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/illustrator_fashion_templates_male.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/ziremubajirafukiniguf.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/castellon_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/determining_importance_worksheets_for_2nd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/business_strategy_in_e_commerce.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/memesefamanojemuzifiweliw.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/android_10_para_samsung_j7_pro.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF741 4676 bytes
SHA-256: 52496327b9ac18e1c7354a5534c1401adeaa256aa3b4a675400cb54272939b61
font_01_sfnt_off0001073e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073E 10664 bytes
SHA-256: 2a31215e588aa40aa9d07f4320dc9ed3014c4e7100aa78a789bceb199a1e2eee
font_02_sfnt_off00012b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B90 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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