Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8fade64fe5780f…

MALICIOUS

PDF

79.1 KB Created: 2020-11-10 12:31:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 64c980e77dbb68b5388f60a55174c29d SHA-1: df07de6ea8ec1992e753b65359f011b5fd2ca97c SHA-256: da8fade64fe5780ff7639351ad304e804412bc339d02124a2b0a722b318214cc
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 0.9998

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
  • 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://jajipovel.weebly.com/uploads/1/3/4/5/134527293/3259957.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://traffset.ru/123?keyword=leadership+contingency+theory+definition PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5f879d52e0673.pdfIn PDF document text
    • https://jajipovel.weebly.com/uploads/1/3/4/5/134527293/3259957.pdfIn PDF document text
    • https://danizodeker.weebly.com/uploads/1/3/4/5/134581754/voxesidej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f8fed2ee49d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_5f891522afb56.pdfIn PDF document text
    • https://bogigusojuvifu.weebly.com/uploads/1/3/4/3/134316749/mojozitafefix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417321/normal_5f986f23d9823.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/48e32476-283a-42d9-8098-15e5a3dd7cf4/6646789673.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/cromwell_public_schools_teacher_contract.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3128413-04d5-46d8-81a0-7e9957628eb2/nuwupijezobogavojogatowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81f52bae-3a07-4e37-b203-ab49e5b9b3ce/xizopit.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_off0000f8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CF 5428 bytes
SHA-256: 3a147ba4329ef4c162cbc203f1ce952935ff4178f8f3c5d96ccbc8ae04e5c75f
font_01_sfnt_off00010b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B51 10820 bytes
SHA-256: 902dd85a1cb36ddd1610e87fc064d9d049b3279a78f066ab2073c42a40a46c5d

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