Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aa45ea53b01735a…

MALICIOUS

PDF

65.1 KB Created: 2020-11-18 13:02:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 79a540f7810ee8e5e2a0c5e425c6f9de SHA-1: b69604f4b877258eb4b29f07299a6d327fda0c18 SHA-256: 4aa45ea53b01735a2bf7c8fe607c8253f553fd12ab1ec84dda000730feed5ea0
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It contains a link to a known malicious redirector, https://cctraff.ru/aws?utm_term=bangladeshi+song+ringtone, which is likely used to deliver a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a "Bangladeshi song ringtone", and the presence of password protection instructions indicates an attempt to bypass gateway scanning. ClamAV also detected it as Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/aws?utm_term=bangladeshi+song+ringtone In PDF document text
    • https://cdn-cms.f-static.net/uploads/4447436/normal_5fab0afbdeb1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371013/normal_5f93b4c5d9b78.pdfIn PDF document text
    • https://purusoze.weebly.com/uploads/1/3/4/4/134495244/8420527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f8c24d8ca3e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/muvunekagok/71053969233.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/20410439808.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/faringoamigdalitis_bacteriana_pediatria.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/56644018134.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/mythical_creatures_in_hindu_mythology.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/touch_nail_salon_toms_river_nj.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/tadusizekas.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_off0000c2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C5 5136 bytes
SHA-256: cfb50a5c694b5250206a12a09f8ecc39743e2c56e5c59c14bca54b542cf28994
font_01_sfnt_off0000d430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD430 10596 bytes
SHA-256: 5e3d0326df98a26681d73274086068e73ab6ee808497a804e716ae1a028f3b40

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