Malicious PDF — malware analysis report

Static analysis result for SHA-256 9773f621e6a52045…

MALICIOUS

PDF

69.3 KB Created: 2021-02-22 04:44:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 021d282b12373e0933e7f8b096b789db SHA-1: 469238fbe0bda1f7f16a473a8c250a80243854e5 SHA-256: 9773f621e6a52045b9b68cd11f39049053d8e669479a597c6ad9104f465eff07
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, suggests a lure related to a 'Medialink router user manual', indicating a phishing attempt to trick users into visiting the malicious URL.

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
  • 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://jottigo.ru/123?utm_term=medialink+router+user+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376371/normal_5fcc932fdffad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403274/normal_6018c67e53724.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464083/normal_601b3df06debf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461511/normal_5fe660d5316e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452839/normal_600658e790edc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477400/normal_5feb0751eb831.pdfIn PDF document text
    • http://design-kvartira.info/dorerikizubiviza7jf17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373259/normal_5fed01e063bcf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403952/normal_5fc8273c2b65e.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/iajdidV/hang_glider_price_in_nepal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_60109f9ec489d.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/seek_ye_first_sheet_music_freeo2ty7.pdfIn PDF document text
    • http://topstop.site/how_to_read_better_and_faster_by_norman_lewis_amazonbh1y2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kizifisen.rf.gd/67443787024.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_off0000d2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AB 5040 bytes
SHA-256: a9bea878afd1e80aefad82fe988f8dd54197cd93898f86f79241ea47e0522834
font_01_sfnt_off0000e3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C1 10880 bytes
SHA-256: 4780ac5a1c8c7b3f64b777b49a86eb0b5b4a8699e3a326e4bbb9d99a3ab94789

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