Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b56b149553bc3ff…

MALICIOUS

PDF

90.3 KB Created: 2021-01-09 16:58:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5227cabdb721efec93e947a95d896a7e SHA-1: 97964022d9679c89b5f54f664ede95c39f08397a SHA-256: 8b56b149553bc3ffcffa0663c78e060dfe5e054d9c0c85c13f1e7ebfda145864
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing a malicious redirector link to 'https://cctraff.ru/aws?utm_term=bangla+pala+kirtan+audio'. ML classification and ClamAV detection strongly indicate malicious intent. The embedded URL is likely used to lure users to a phishing site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/aws?utm_term=bangla+pala+kirtan+audio In PDF document text
    • https://tirevenisigagum.weebly.com/uploads/1/3/4/5/134500803/wuwaxot.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/pntVibZ/libibetasakowafasud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453747/normal_5ff23a4b85ee8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387408/normal_5fc8d48d98c3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444853/normal_5f9d774e135d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456998/normal_5ff1672e9525c.pdfIn PDF document text
    • https://rixemeja.weebly.com/uploads/1/3/4/7/134711448/fixepeporido.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413347/normal_5fa5b01d3bce1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481285/normal_5fcd89210928e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497687/normal_5ff417d12d0f9.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/15ea4a1d-bdae-4c0d-b232-7f8c52e41209/jajobaxobavufobelexudevej.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/26378895065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aaad29b-9ca5-4277-9203-911d805438dd/xupagipijedekipipovaputo.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/fish_cheeks_summary.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_off000126a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A6 5060 bytes
SHA-256: e7b59970c7120a9588b2dafb0597fee434d7df17017feb24b4ceed2ef5374988
font_01_sfnt_off000137f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137F0 11080 bytes
SHA-256: 21e0f235a03707a6f6bc5121d83f8f8dbf58fdae40257b272edd6a85359ccb5c

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