Malicious PDF — malware analysis report

Static analysis result for SHA-256 35da33dc71e3e87d…

MALICIOUS

PDF

72.4 KB Created: 2020-12-25 23:45:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 9b8420e2e563727579c756b1cb16ee23 SHA-1: 1d095351354f18c533d3beba630d3f39ce09328d SHA-256: 35da33dc71e3e87d21115c3cbcd0c2dc2bf2b97e651609627dc4d35c59be8f69
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body contains a deceptive title that mimics a search query, likely to trick users into clicking the embedded URL. This URL, 'https://traffking.ru/strik?utm_term=how+can+i+change+my+voicemail+to+english', is the primary indicator of compromise and is likely used to deliver a secondary payload or redirect to a phishing site.

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://traffking.ru/strik?utm_term=how+can+i+change+my+voicemail+to+english PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402953/normal_5fb2d9cc1bd3a.pdfIn PDF document text
    • https://tisikifa.weebly.com/uploads/1/3/4/6/134614219/rumivikezozabi.pdfIn PDF document text
    • https://tulorikuxefuwi.weebly.com/uploads/1/3/4/7/134730127/xelenuxugumikiz-deturinazunatid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5fb6402d73d56.pdfIn PDF document text
    • https://nerutaraludu.weebly.com/uploads/1/3/4/6/134672403/podugonupo_zevov_mevowivigog_jusafomiser.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505159/normal_5fad59ba188e6.pdfIn PDF document text
    • https://pavuxutekukos.weebly.com/uploads/1/3/4/7/134704216/c6469a22ba4e73d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376359/normal_5f8f7812cbbce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450338/normal_5fbddc378be3e.pdfIn PDF document text
    • https://jubekufolofifi.weebly.com/uploads/1/3/4/5/134593927/delawakasolexud_mufux_wijozozowemenig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388050/normal_5f90ddb09cf5a.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/ead8a8af-b048-4f8d-9af7-b5a6a44caaec/peridibapoxolemituwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5f0d0f9-a9ea-4ff6-b278-d7f6c8f86670/63481467628.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8AF 5332 bytes
SHA-256: 5876def61364f99d37ed228e042061992a40c82f7278a3e693bc34548ebf43a9
font_01_sfnt_off0000dad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD3 10560 bytes
SHA-256: 2c5f386bb141e55c552d06181b187f1bc485baa7c2fb06e260219c476351d3c0
font_02_sfnt_off0000ff0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0F 16344 bytes
SHA-256: 3745d395dffe053ce12bb6e6d543a89fda750690c61e1e786fb35984b58e44e5

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