Malicious PDF — malware analysis report

Static analysis result for SHA-256 10dd50ecf040635b…

MALICIOUS

PDF

83.4 KB Created: 2021-05-01 09:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 595d7344e446e0824dc9a412cb3ad3ae SHA-1: 58e3017962fae6fd40cbc5d31b080b988ee3b7d2 SHA-256: 10dd50ecf040635b663be4e0644e42437137164d7907b1cf4e7d4ca42f6876b3
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic and ClamAV detection. The document body, though heavily obfuscated, suggests a lure related to 'Dungeons and Dragons 5th Edition PDF download'. The primary IOC is the malicious redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=dungeons+and+dragons+5th+edition+pdf+download
    • http://vezizulavojunif.22web.org/aviation_exam_question_bank.pdf
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5fd67cc60e393.pdf
    • https://cdn-cms.f-static.net/uploads/4376625/normal_605ef03c72e63.pdf
    • https://static.s123-cdn-static.com/uploads/4407777/normal_5ff078952930b.pdf
    • https://cdn.sqhk.co/vekuperik/9FWzehb/black_cheetah_running_shoes.pdf
    • http://fawetugamuxix.66ghz.com/sheet_nhc_kht_vng_ma_xun.pdf
    • https://cdn.sqhk.co/sileluzorupo/MgeGhjc/bubbler_drink_nutrition_facts.pdf
    • https://cdn-cms.f-static.net/uploads/4373782/normal_601600d2e7baf.pdf
    • https://cdn-cms.f-static.net/uploads/4459463/normal_6033313909a27.pdf
    • https://cdn-cms.f-static.net/uploads/4469350/normal_60388e80257bd.pdf
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5fd63954b85ce.pdf
    • http://taxutipepavij.iblogger.org/functional_analysis_by_pk_jain_free_download.pdf
    • https://cdn-cms.f-static.net/uploads/4403940/normal_601b03e0c28f5.pdf
    • https://static.s123-cdn-static.com/uploads/4412593/normal_5ffd35ea3f2f9.pdf
    • https://cdn-cms.f-static.net/uploads/4493553/normal_6018dd44544e7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://pofumitiko.epizy.com/wijajen.pdf
    • http://sokevigaku.rf.gd/mega_early_childhood_special_education_study_guide.pdf
    • http://piwapikefiraxi.rf.gd/comentario_de_texto_argumentativo_resuelto.pdf
    • http://vivefisapef.epizy.com/advanced_sports_nutrition_2nd_edition.pdf
    • http://magobugibex.epizy.com/84153942045.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9f9.bin
aed9f24609ca9f46ae64afaa93a47abbcd2980855f43aae21dfc6f85d3c9b705		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F9 5400 bytes
font_01_sfnt_off00010c68.bin
f6b9d196b3afe552c33e4f8f99f9a681ea2f7ffbd3377bf48bfcf8b7b8cf0fb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C68 10964 bytes
font_02_sfnt_off000131e0.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131E0 4324 bytes

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