Malicious PDF — malware analysis report

Static analysis result for SHA-256 50eb90dae9c5d7c6…

MALICIOUS

PDF

70.5 KB Created: 2021-05-27 22:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 448071efb56b45f085d095725165b296 SHA-1: 89c818651cbf4d2be28cd7937ceb1f8bdbade1ad SHA-256: 50eb90dae9c5d7c6f1c37718f841813f50b0141c568197d9cb2a7de7944db359
156 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. 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
  • 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.
  • 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://xezojetit.ru/strik?utm_term=norton+anthology+of+american+literature+%2528shorter+9th+edition+vol+1+%252B+2%2529 PDF link annotation
    • https://lapimirisa.weebly.com/uploads/1/3/4/3/134372347/gojimizonemu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368962/normal_6002df2e29dbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381095/normal_600c8bb1cc78c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451355/normal_604e48b0d3ed6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374366/normal_5fe461c594d2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392668/normal_6016f0ef9c0ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489977/normal_5fd1fadf1813b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420240/normal_5fcdb68ce72fa.pdfIn PDF document text
    • https://romiwewigases.weebly.com/uploads/1/3/2/6/132682929/sunini.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387811/normal_6000b526a51ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427077/normal_5ff8b1a2d2a22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471096/normal_606774abbea11.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/b80b2b4d-21cc-4e22-acba-628380f8d407/betegimuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b4b8556-a361-44f8-8fe2-72b46ab1b7d3/christmas_math_worksheets_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f1a5ae7-68df-40c5-b2bb-fed3a374c37a/lomulabitojesituzor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc3b5639-f2e4-4b78-9666-e88d739a8d94/betatujapik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f80a9fe6-a27e-420b-b1b8-b149b0b83d26/what_is_boundary_condition_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a2d8a78-c3da-44b9-a626-cdffce548dd6/car_aerodynamics_simulation_software.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD322 6060 bytes
SHA-256: d000216c3acdbcefd5cd91732bdb91edca73b325ad7fb9ce657019f56d6a7f5c
font_01_sfnt_off0000e7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C6 10608 bytes
SHA-256: 027522179b8cb10d3406f9b4dcb584d37a14eb51b479871dcb898ac46d35edb1

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