Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf19f14f4e68f150…

MALICIOUS

PDF

62.6 KB Created: 2020-11-24 16:03:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 03acaa5ecec5e9f36a389d9c80a44efd SHA-1: c6de26b675b7e85cae7e95f4e9fdc2632a3f6354 SHA-256: cf19f14f4e68f1505ee20428a6d69539e7e207efe689460bc4389b9a25ca83a2
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL suggests the document's purpose is to lure the user to a compromised site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffmen.ru/strik?utm_term=believer%2527s+bible+commentary+by+william+macdonald In PDF document text
    • https://cdn-cms.f-static.net/uploads/4452171/normal_5fa335d731d4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485935/normal_5fa7a5e049b16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413108/normal_5f97d960db01e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412894/normal_5fa8fb827d723.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/09ce893b-618d-4297-acce-75218a0b0e32/doraemon_the_movie_2017_great_adventure_in_the_antarctic_kachi_kochi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/takep.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/5407669148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7738462a-41cc-42ce-9ab1-39e994992efb/jununavarimadog.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/68454386671.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/angels_blood_read_online.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_off0000b8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8B4 5564 bytes
SHA-256: 333796840c4b74438e07fead68ac35b08564d15610e11cfbccf554b2a1b9c8f7
font_01_sfnt_off0000cba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA8 10068 bytes
SHA-256: 07379d5ca8f63cbe68ff72657ad4432299b917408f34ec0758c5740ad97c48a1

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