Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e4e945474a8dad…

MALICIOUS

PDF

70.1 KB Created: 2020-11-25 18:21:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f2c084ed8413b079d4eff28803235742 SHA-1: 24b3bd9e2afe5e47b9455fb95262b681c91d9682 SHA-256: e1e4e945474a8daddb2388da88556b73f080613823f510fd69033aebe6e9c5a1
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=greedy+cave+2+guide'. Additionally, it exhibits characteristics of a link farm with numerous external PDF links, including 'https://s3.amazonaws.com/rawesaragegugar/comparison_worksheet.pdf'. The ML classifier and ClamAV also flagged this PDF as malicious, suggesting a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://cctraff.ru/123?utm_term=greedy+cave+2+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414869/normal_5f9d69371173a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459631/normal_5fbc369a83656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f871c75469e4.pdfIn PDF document text
    • https://dekomowunine.weebly.com/uploads/1/3/4/6/134638227/2332a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499317/normal_5fbc7402c99ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/comparison_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc3cccc4-408f-4946-a407-8d138c1efa8b/tagatitufenulotarusez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9479c041-d364-4802-b011-3629805e1092/25303963657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03a61486-7ee0-4828-94da-05dab71a058e/161_bus_schedule_hartford_ct.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/559988ff-a9bd-49ea-8b34-3135ce0c621a/nuance_power_standard_user_manual.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC844 4808 bytes
SHA-256: 05c2c305eaf039de77a5141abfdf6c1590d31513a28eb473d2d4765aa30b0f27
font_01_sfnt_off0000d8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BA 10744 bytes
SHA-256: 71a151aad74b27e071b0bfce7480c06263cc4e9fbf945910818055b300daff7d
font_02_sfnt_off0000fd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8F 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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