Malicious PDF — malware analysis report

Static analysis result for SHA-256 72c0c9f2a453c2c5…

MALICIOUS

PDF

74.6 KB Created: 2020-11-12 14:12:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: eab40b8650028e406bcd4942f1631828 SHA-1: d9092a77f3db8126db94a8126d9bf6c40e0937fa SHA-256: 72c0c9f2a453c2c57499ea36a82cc4bd4cca32e8c7fb913ce1eaf8d0b037973c
96 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 external URLs that direct users to attacker-controlled resources. 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-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://trafftec.ru/123?utm_term=rumble+bee+challenger PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427781/normal_5fa2c9ae00922.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5f8a4aa70e1e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366642/normal_5f908b5746cd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5f9e383f7304b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406820/normal_5fa0dede90024.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/21a5fb25-dd46-4a80-a4cf-5c58b8756cd4/sugebiwavepeb.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/spray_tan_machine_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7404b384-a97c-4278-883a-01d937009ff9/donotigapewudetijuziv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded9b8cd-f315-490e-b874-f0eecd7f53a5/pukarisuturusutix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/918bd324-6647-48c4-9153-58d39fe20668/subtracting_fractions_with_variables_in_the_numerator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb0e3f4-155d-4d46-8ba8-1e42343f0d29/1_4_7_10.pdfIn PDF document text
    • https://s3.amazonaws.com/mazugezijap/85219863246.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/sus_transformer_book_t100_chi.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_off0000e3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A3 5184 bytes
SHA-256: 8b15ac4428c552793a70c4d169f0970bc6b07734dc740866c2260cf5ec2be1b6
font_01_sfnt_off0000f51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51D 12280 bytes
SHA-256: 6dd823a38ae49ba4505e0dce90eb4d8078ec6ab7737cde9b356b3b589be038b4

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