Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db17f33872df608…

MALICIOUS

PDF

80.4 KB Created: 2021-01-05 05:48:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f5919da3a967ab91d736e4c585598d6f SHA-1: 264262972107ac27827736296a0919b07879c975 SHA-256: 8db17f33872df608c7a7701b76dbcb352d966a60273e06bd8a6d99e859c286d4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely as part of a phishing or social engineering campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffine.ru/123?utm_term=ventura+high+school+alumni PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366022/normal_5feb7f1095644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487206/normal_5fc27e522e0fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387807/normal_5febde740212c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417658/normal_5f99962ae369b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_5f9075a61a9c9.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/84d10e40-94ca-4282-af45-1428a0783d21/oral_and_practical_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/las_48_leyes_del_poder_completo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb976c5b-43ef-4787-8166-6a16f7d8f919/96545582448.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/keogh_report_14_hospitals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8656d584-a26c-4977-beca-f3e0873a0e3f/mens_overalls_shorts_fashion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c996bc1d-7e18-4e7a-bb0d-a0807e9305fc/81157036660.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1234459f-904d-42b7-8694-889f9ed799b1/20325071800.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/84654704140.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_off0000fda8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA8 5180 bytes
SHA-256: 1d0d8ff56368f836befa93364eb850821cab0e06387e8e71f05012643d7d2796
font_01_sfnt_off00010f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F24 11076 bytes
SHA-256: 8f5ae6d87677d529dbc17de7d5065b1c41650be3fc474c9a54d4ed6f65d08a11

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