Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b04605eaa73efa7…

MALICIOUS

PDF

65.4 KB Created: 2021-01-28 11:18:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: be5a2b6346e5c998c19742a37871f4de SHA-1: 8f2844e6daac37f93d2fb12ccc7707ec9b5e0d5b SHA-256: 6b04605eaa73efa70c0631fa99acf51dd90455322b4bf44c8857ecb26590ea9e
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, one of which is identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to sheet music, directing users to the malicious URL.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/aws?utm_term=amazing+grace+flute+sheet+music+easy In PDF document text
    • http://davufemalolaj.iblogger.org/performance_appraisal_comments_for_nurses.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379964/normal_5ff9db804893e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474176/normal_600561135d437.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446280/normal_600a1ea73661c.pdfIn PDF document text
    • https://cdn.sqhk.co/winudesuw/jbjgiie/moneylion_mobile_banking_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489428/normal_5ff639b729816.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/gemUShb/kujub.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzesowasu/5vzihxx/tomcat_pop_new_bubble_shooter_mod_apk.pdfIn PDF document text
    • http://keepmaxi.space/pomiduduvicqtxk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366662/normal_60035ecc37ef4.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/hgegdAz/business_analysis_manager_capital_one_salary.pdfIn PDF document text
    • http://gexafudotifunud.66ghz.com/cg_piano_video_com.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495841/normal_5ff3be7420649.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450512/normal_5ff278222e981.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461483/normal_5fecfa15b0222.pdfIn PDF document text
    • http://iglivesupportteam.com/gradle_compile_vs_implementationkpzf7.pdfIn PDF document text
    • http://wowmarket.info/final_fantasy_tactics_war_of_lions_ps4rm4yu.pdfIn PDF document text
    • http://albl.ru/stick_it_cast_real_gymnastsjp6tr.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/luxelula/62869139329.pdfIn PDF document text
    • http://fiwitotakego.rf.gd/anova_precision_cooker_owner_s_manual.pdfIn PDF document text
    • http://vudatuvabejosix.epizy.com/letter_sheet_size_in_cm.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_off0000c16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC16F 5436 bytes
SHA-256: e375744ce64d40068e3103c81a2ccd6ad832a59c12fb6506660a5673ac678bbb
font_01_sfnt_off0000d3d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D1 10776 bytes
SHA-256: bc9f1906e5991a9fb5700db77b5523e867f756130430f11609c8ffca8e7d91bc

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