Malicious PDF — malware analysis report

Static analysis result for SHA-256 c88087679b2504b5…

MALICIOUS

PDF

72.1 KB Created: 2020-11-19 02:16:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e6808389e6ddc1b4842b873376f45df5 SHA-1: 1d0205640bffce3c0e45c9527861350b2fbd8a5c SHA-256: c88087679b2504b59ff47db0e0dc74a40e490d46e60a2fde3ad0306cc19f9a8a
214 Risk Score

Malware Insights

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

This PDF file contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious, suggesting a phishing or trojan payload delivery. The document body, though heavily obfuscated, appears to be a lure related to travel documentation, consistent with phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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?utm_term=do+i+need+a+passport+for+the+bahamas+from+the+us In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381532/normal_5fa398cc05ab6.pdfIn PDF document text
    • https://nugaridepi.weebly.com/uploads/1/3/4/4/134474671/webiti.pdfIn PDF document text
    • https://fulodovujigiw.weebly.com/uploads/1/3/4/0/134016909/1158152.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/d3376291-0845-4889-83e1-68c7f00f4668/97178741727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65ae36ed-5ddf-4ff8-96ee-52335fbea9d9/goromi.pdfIn PDF document text
    • https://s3.amazonaws.com/xatojem/picasa_3_download_for_pc_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8773888-1396-4e1d-aea6-d8b7a0218bc7/97529657036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/911d1457-1c53-4aca-8d47-4f98d4854118/leviathan_wakes_corey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60613c0c-3479-4d7c-a721-c4ab2863d20c/jakitalazojawobanikexex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57691eb9-6a22-4942-9fb0-43f30f65653f/download_in_background_ps3.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_off0000ddc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC6 5388 bytes
SHA-256: 0032794472556999d92b2fc53344775a374a562f5700c4f87699c68aad0385f9
font_01_sfnt_off0000efec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEC 10300 bytes
SHA-256: ef3a022b0cd65dfb3d4755d6584a1d2e28601013ffcae095bd5ace8c8f0d65c0

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