Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ac7b8b589262c7…

MALICIOUS

PDF

68.1 KB Created: 2020-12-09 10:48:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fbae440509224854c5a6cbfb544e17f7 SHA-1: 9249d572b7e3c465fde6d3f497e8675f28862a1c SHA-256: d7ac7b8b589262c71bd20d720e08a8a71d879ff5f55d6006d05aaedad11dced1
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/strik?utm_term=gloversville+high+school+graduation'. This URL is likely used for phishing or to download a secondary payload. The ML classifier and ClamAV also flagged this PDF as malicious, supporting the phishing and potential malware delivery intent.

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://cctraff.ru/strik?utm_term=gloversville+high+school+graduation In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387056/normal_5f8fdf8269f6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404984/normal_5fc2ee283ac97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_5fbdb99e76ada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f876258c7e08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444114/normal_5fc13a90e9c4d.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/c463fe18-1c47-4234-be01-be3bf725ef92/juzivenigiduseb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5fc754c-480a-4f75-be3c-ee22a62e4b2c/ezra_brooks_decanter_price_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7533cbfb-08ee-40ba-8ca8-695d35a1fdf0/the_good_dinosaur_2015_sinhala_subtitles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a72ec8e-5255-4f60-a41a-52445c430f9a/terakumuxegovobaxofiroma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50129d6f-a1a2-45be-8ae7-9690dc8fb605/how_long_is_tonights_game_of_thrones_premiere.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0873a11f6a4198483d0f6/t/5fca8afae4bfa1297acdd9ab/1607109371526/robot_shooting_fps_counter_war_terrorists_shooters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d8bd5d4-a3be-41b8-b697-6f6546752ae0/25354706067.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7cda0b9-7967-4dc8-bd39-0c92632d91e0/20779466640.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_off0000cfc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC8 5292 bytes
SHA-256: 1dc92b11db5de58b1dcfa7042567cd006e3273d1a4f8e488ebff961fa40c41af
font_01_sfnt_off0000e1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CB 10020 bytes
SHA-256: 96e7703091c990f403a619a193c2e47f8beff3764dda78d65b1454890765b5f7

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