Malicious PDF — malware analysis report

Static analysis result for SHA-256 754a3f152f1f5c48…

MALICIOUS

PDF

70.6 KB Created: 2020-11-10 00:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b9de18b97c2bb51da5e43a59fa6f8450 SHA-1: d5c16d6f4aeff87630cd9211049b0048abf1069e SHA-256: 754a3f152f1f5c481418d4f95fa20aa1e8d95c92cabb96d9e842cd079e52fa18
154 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 routes users through malicious redirector infrastructure. 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
  • 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.
  • 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://ggtraff.ru/123?keyword=the+house+201 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387711/normal_5f8ed06dd76f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374848/normal_5f90bbb931b26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406213/normal_5f9747727231f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5fa9bcf1629e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380691/normal_5f9065572d739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366995/normal_5f8a705745629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369505/normal_5f889aef4e508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379221/normal_5f90e99449d7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448731/normal_5f9fa42baff5a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/07519647-2ce1-431e-92e4-a2b280b2642c/zekevu.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/minha_vida_em_marte_assistir_online.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/molexakibigivuwesax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d1136f5-a322-4d2c-809b-a68d09a79b44/ankara_oyun_havalar_mp3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a380f46-9d02-4b99-bf3f-ca06f54c26dd/penuzifuzubunetelewitajoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/465f6edc-f155-421f-9b28-d069bc3c084c/rorijofozaxamod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b78b2ac-e30e-4dd5-91d6-7ad42dc99f23/wunobaz.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_off0000ccd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD7 4356 bytes
SHA-256: aa151d0bdb80b16a9e245f4392d534d4157d030a51972b982849254587acbfed
font_01_sfnt_off0000dba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA8 10544 bytes
SHA-256: a10d1adc37d27170f1d9ff123886a64f389b933456df41fecfb4addc21c63413
font_02_sfnt_off0000ffd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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