Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fda7a7f773efeed…

MALICIOUS

PDF

79.7 KB Created: 2020-11-19 14:46:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 768c6314552c1527e37e13652958cfb4 SHA-1: 28bdb5c07a3a45fd91aea3180a526f9c48310357 SHA-256: 5fda7a7f773efeed18ddad66945b146fe963e6864d453071bad5940b2c1f6343
214 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 a large number of external links characteristic of an SEO link farm and 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 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
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/aws?utm_term=apprendre+%25C3%25A0+programmer+en+python+openclassroom+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f895d2bc5ebf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_5fa64245b22eb.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/3794757.pdfIn PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/derazuzipit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393036/normal_5fa1b4a77d59e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450511/normal_5fa3cb0b74cf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367687/normal_5f8a9fb8186f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369905/normal_5f92cb5900fee.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/68ae576a-45d1-4013-b07a-0814f7061066/rita_pmp_ninth_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10e36779-2ed6-4209-8545-788bcbd27cd3/jutarodizudepof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ecf4e84-e707-443f-a69c-e625bdcd05ee/54350234152.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cb5a629-fc9f-4ae1-837e-5953081ecc3a/zekokazise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15d3f22e-6f13-49bc-adfa-2faec1f524b4/mm2_godly_value_list_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/darkest_dungeon_crimson_court_curios_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3524009-9670-417e-9d77-b7c8c79e55e6/dawn_of_the_dragons_ascension_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/141ef80e-f377-4e63-9119-9420404a49fd/18728948720.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDB 5892 bytes
SHA-256: 0b5c5874281de9282d1bdaa03bea77a761aac0d4c143843a18abe3c5915735f1
font_01_sfnt_off0000f144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF144 12432 bytes
SHA-256: c277c21a6aa55ad25ad79cdd476769aa8c67d2bd12eb306510fd015165bb9ee4
font_02_sfnt_off00011905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11905 16304 bytes
SHA-256: 8fe31ac2096c5e11ca20e474ac9d4b0e624cd7c6a3d6648e58269b78a2b36287

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