Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef2c07276e01256f…

MALICIOUS

PDF

84.2 KB Created: 2020-11-19 14:10:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d703266c7f9cf2b7efd9bb36185b0851 SHA-1: dec6f8ecc78e1e3300d1e0237015cdf03a70cb83 SHA-256: ef2c07276e01256f7bd9712f50c69ed64cc52394efb3ed8a79c580f0ee54c50c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://xalemewo.weebly.com/uploads/1/3/4/6/134665704/f2b94e5c.pdf.
  • 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://trafficel.ru/strik?utm_term=the+bluest+eye+discussion+questions+pdf PDF link annotation
    • https://xalemewo.weebly.com/uploads/1/3/4/6/134665704/f2b94e5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_5fb018926c8f6.pdfIn PDF document text
    • https://nebegozanukasaz.weebly.com/uploads/1/3/4/6/134699913/saraduwolewif.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/xaramisajo-zivegegafotow-jugilotam-mivolozev.pdfIn PDF document text
    • https://nemulokisen.weebly.com/uploads/1/3/4/4/134492012/5324681.pdfIn PDF document text
    • https://rosiwefoves.weebly.com/uploads/1/3/4/0/134018148/acfc6f1b.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/vutame/sitewatasemuwebe.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/petopezipumedu.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/97378185012.pdfIn PDF document text
    • https://s3.amazonaws.com/giwurode/56944787818.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/73129409759.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/kugobarebejopaduropikok.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/24091891017.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_off00010d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9B 5256 bytes
SHA-256: 9e8efe8cc7187c4c1ebb4bc6e85afaae0cfe88d876c49d3eae1eac5a43123560
font_01_sfnt_off00011f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7E 10716 bytes
SHA-256: 31313e77364475426a6d08e616045bf4ec5e395fc4ab163b5a5f778cb36f621c

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