Malicious PDF — malware analysis report

Static analysis result for SHA-256 a238f06062d051d2…

MALICIOUS

PDF

69.7 KB Created: 2020-11-24 07:28:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5a2cec79821c0d3f560dd8cf220ed546 SHA-1: 216a98f56073bcee9899efb78b06d7555612c3ac SHA-256: a238f06062d051d2d0ecb3d7d4e5a5a7deb64f81b11d92418c37aebbfff22b78
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://ggtraff.ru/123?utm_term=amsco+chapter+10+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4449603/normal_5fa53741a6033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380086/normal_5fa03691edb8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367674/normal_5fb89d5da5dc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_5f8f8ec60e37d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424696/normal_5f9ebf8ec38d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5fb29adcbf838.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f8f5510a4c08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479906/normal_5fa8c70d96cea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f870af47dbe3.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/8e60b623-fb7d-4c72-9246-5dd7e0432713/ziketogagubotobenovamip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f5670df-71e0-43e9-8c69-9d57fd563c18/hospitality_facilities_management_and_design_fourth_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d074190-13e9-4680-af6e-789f2c0afd3f/pmi_acp_exam_prep.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/bugoxugapuretu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b506459-d2f2-4030-abdb-f38c41a2b1d8/zevumifirejafi.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/spider_solitaire_2019_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/3994746541.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_off0000d2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F7 5416 bytes
SHA-256: b297005fff4f254f46bf0f613aa5b9ad04c90b3026cf40b86dc827dccd7c0800
font_01_sfnt_off0000e549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE549 10700 bytes
SHA-256: 2f1102eb750622a6c875cfe74c502fdbe44d9bc2f6b0d5c5c45f2aa9f774c6a4

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