Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c6b221fd46b8b0…

MALICIOUS

PDF

82.4 KB Created: 2020-12-30 16:23:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6c3784f09954ee972b688ecb7f304b8d SHA-1: d3a3145b051740f992f0857d554670e07ce3a681 SHA-256: 27c6b221fd46b8b08203dd1f8e1436e733cd2219128cb4faba345998aa4c5ab4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'traffine.ru', which is flagged as suspicious. Although no explicit scripts were extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/strik?utm_term=marble+ball+madness PDF link annotation
    • https://cdn.sqhk.co/bulenupulabo/jbgfjbb/nfl_standings_2020_nfc_east.pdfIn PDF document text
    • https://cdn.sqhk.co/vibifexode/ITujadn/93335346164.pdfIn PDF document text
    • https://cdn.sqhk.co/bidomutarili/dzggD7t/17976556107.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/617f52f2-ecf5-409e-bddd-84e86da87b74/medical_surgical_nursing_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c7e651-c634-40cf-8275-63458dc35b0d/dr_seuss_bible_study.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7302e7e-244a-43ea-98f9-7c1d4d48cec6/mitsubishi_turbocharger_td025_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38693a7c-a59f-4b07-98a0-165447343bfd/schreiber_high_school_alumni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e40cc7-ce6e-45f4-ad1f-9901b2f5b3f7/35871748060.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/81234034933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01e8d405-3904-4d55-8fcc-f1d3b55a91c5/bogomelipapubenapojirexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff5884a-8a5f-4eb3-a159-2a725716bd61/1871991257.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/android_10_huawei_y9_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AA 4208 bytes
SHA-256: 3c15e8b718bea8185faf2cf56200b4444475ccd968bf2587abf4569ae5d4808c
font_01_sfnt_off00010764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10764 5116 bytes
SHA-256: 4e9b394407d5a3ecf08d6ce88a68f3fbe9566dfe7dee60c078453d0148b558ee
font_02_sfnt_off000118af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AF 10552 bytes
SHA-256: 4e3edafba0596526de39bf5f17e85d1c0307689c39ee1db6288d48eb1cafa7fb

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