Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6858353bb7914a…

MALICIOUS

PDF

78.0 KB Created: 2021-03-22 04:45:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c4d4bf2b1426fc8246f0c71126cf6443 SHA-1: c5ce9532148cc2024da9ee5ddd19a071ba6b8099 SHA-256: fb6858353bb7914ad78d092c61d898cc95864d91ab77aa28fefd7f41a958c1a0
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a redirector URL associated with 'free-download phishing' and the document body content suggesting a lure for 'Bouncemasters vip mod apk' strongly indicate a phishing attack aimed at tricking users into downloading malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://soxebez.ru/123?utm_term=bouncemasters+vip+mod+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454286/normal_6007eb425b00b.pdfIn PDF document text
    • http://zelafagilu.iblogger.org/jixidikivulifo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408707/normal_5fe2411d026d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486563/normal_6013c10fdd2e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482206/normal_601889a59c327.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/gcjjqhe/worisolafi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_604ec3fe16a82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412382/normal_6011e75186d8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444356/normal_6016d473221d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380530/normal_601a66cfd2140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425504/normal_6050f467e809f.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/YhbggK9/cook_county_clerk_court_criminal_case_search.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393762/normal_5fc9b27a3d0cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459182/normal_6046f5436e4c9.pdfIn PDF document text
    • https://cdn.sqhk.co/puwupasakej/iILhauc/fitelebizafedi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386334/normal_5fdfda8082bf4.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/wizitifowubux/xevapezivebinujimeb.pdfIn PDF document text
    • http://degedudu.rf.gd/monthly_expenses_excel_sheet.pdfIn PDF document text
    • http://lunupoxupa.rf.gd/burning_sands_jihad.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/brunei_visa_application_form_singapore.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/52828847205.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/inteligencia_emocional_daniel_goleman_resumen.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_off0000e604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE604 5360 bytes
SHA-256: 7e69872271d6e8352040aca2cee64ffbdb9124a4679a943f4de38de91ca01276
font_01_sfnt_off0000f82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82D 23032 bytes
SHA-256: c6c954c42bcf84108b907fbc13f025f704e218716b9ba6217e61b5c52b56c4fc

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