Malicious PDF — malware analysis report

Static analysis result for SHA-256 85db0772caebdcb6…

MALICIOUS

PDF

70.8 KB Created: 2020-11-14 22:59:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c16532bd168be43ea282f9a72d1f0a96 SHA-1: d6e89e96c11114ee89d62fca06f34e156d1993f3 SHA-256: 85db0772caebdcb6251dc9a1bf0cdfad5aa82f3c809a525b19619798de78a837
96 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 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 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
  • 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://trafftec.ru/123?utm_term=abraham+and+keturah+family+tree PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378855/normal_5f92da1ee04c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5fa2043cae3ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f96980ac104b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_5f9238169fe3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375197/normal_5f8c91871b932.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/e6bb933e-bd68-4f3d-942d-8b68e9cd58b8/135630782.pdfIn PDF document text
    • https://s3.amazonaws.com/tagorarib/98791651282.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/ruzefeboraru.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/condo_questionnaire_form_1076.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/letter_of_continued_interest_law_school_spivey.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/ankle_fracture_rehab_protocol.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_off0000d9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CA 5264 bytes
SHA-256: 3d4726fdf418953c9cfcf64e85a2e480fcf9e54297ba6f274c93c30dc99605c4
font_01_sfnt_off0000eb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8B 10468 bytes
SHA-256: 868b49d85b84a438d28ba53c0a3134297760127b3c09bfbf8ae89301af0968bf

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