Malicious PDF — malware analysis report

Static analysis result for SHA-256 650a8024ebf4ffca…

MALICIOUS

PDF

66.4 KB Created: 2020-12-02 00:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 91f53249aabe3e8ae90522369d21b64f SHA-1: d2ae6bf9bbfde1aeac176157bc5ae80e39bbb7d0 SHA-256: 650a8024ebf4ffca0da6bbd39475f0b0fcc50327c277e4b93dbcd11c77b797ca
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=change+in+demand+vs+change+in+quantity+demanded In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426545/normal_5fac5a440036f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413236/normal_5f9cfbe3d8489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459059/normal_5fad646282b37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375509/normal_5f8bf236e4489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450247/normal_5fc2099bbb798.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5f8ef165bd3c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449630/normal_5fa42038cacb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374522/normal_5f8cbd0faa956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457332/normal_5fa5237e4333e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484999/normal_5fb305d66f1c5.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/bawalidamovidud/boy_in_the_striped_pajamas_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f319ab79f442f229e2d8/t/5fc3c0a73f75b1664346c235/1606664359816/97167044583.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/wofeluzizefefibabomajekir.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/perimeter_area_and_volume_test.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_off0000c788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC788 5416 bytes
SHA-256: 2edf32f3dd13e359cd9ce334248f550d2728714072b21d5677b88921ec7921a6
font_01_sfnt_off0000d9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D2 10092 bytes
SHA-256: dc5ebbbb2196e6ac54a7710952ab2d0f409eae8ab14bde268303fd5f641173ea

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