Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d18f8e6888633b…

MALICIOUS

PDF

75.6 KB Created: 2020-12-29 21:11:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ef112dc8d65c09730148d27f6ceb3a8f SHA-1: b6180c96a2012abc5b07667c2b8e22c80b93821f SHA-256: c8d18f8e6888633ba8b8b70a48b1e64ff97b42dcd34ae4f8a59e1bddd4845fd8
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://traffmen.ru/strik?utm_term=owning+a+barbershop+income In PDF document text
    • https://cdn.sqhk.co/gabisolovima/503gigf/battleground_survival_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/zoboxoba/ibihgVe/57019819261.pdfIn PDF document text
    • https://cdn.sqhk.co/pavujakorige/geEBJhf/pezag.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/jiWGggX/mobile_phone_ringtone_english_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407777/normal_5fa1507230a81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371812/normal_5fcf30bff0362.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6ac09c1-079b-4f48-9cbd-2a85d7676694/charlotte_joko_beck_dharma_talks.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/47386332140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7223fc23-25ad-42f3-aa28-ee8b52209578/grace_brethren_christian_school_basketball.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0138b3a9-d967-4933-9804-27ef71f58cc0/badejejerim.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/5418046376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c31755c-cd27-4cb2-8766-d4a33e51f75f/another_word_for_not_as_a_result.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a88bb0c-7e78-4fd1-9e57-2b8ea3cbd47a/najum.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/77949593943.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/sixth_pay_commission_report.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_off0000e8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BD 5576 bytes
SHA-256: c53a94c29b2df286bfb581ed006a7d1d494756f2ca751c026eca4a089553badb
font_01_sfnt_off0000fb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB97 10988 bytes
SHA-256: 9ed50e46b27ae0658bbfae922d019d9e269fe6d1fbf7880739d1e57b4980e083

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