Malicious PDF — malware analysis report

Static analysis result for SHA-256 556bf94265bcc9e2…

MALICIOUS

PDF

69.4 KB Created: 2020-11-28 02:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d2783e3df9d4464e1d5741825f228a46 SHA-1: 2e74ab391fb8a4c96442b52d35ac2f7317d4a37c SHA-256: 556bf94265bcc9e2ec918255d599417bd44519b6dbb9c880126a5108a9e9a77b
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?utm_term=buffalo+chicken+burgers+delish In 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/7704b7d5-4316-4fd0-b5f3-f457dc0c24a7/wabemawuzuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d69e6b6f-f03e-46b6-af5e-4def27a23add/virtual_girl_full.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/ark_ascend_command_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8859d7c0-7b86-45de-90cf-a55d6503e972/zozuvud.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/xulizobikowototoborodax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ece362-8314-443c-9ce3-c1ea1408e272/11572158497.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/clinical_biochemical_tests.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b094dbd-20bc-4745-a7c9-9293533329ca/download_video_editor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d12253-1988-4437-a78b-9e525a9f244c/sotes.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/vipowam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b27bf026-34ca-4ef4-a47f-99d118179f97/raxuxoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07047f99-bbc2-453f-9ec2-84de009aaae6/naguvixemitewoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b12067cc-7f27-45ad-b1a5-da29fd2856ed/rotop.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_off0000d226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD226 5536 bytes
SHA-256: d01a51c2757233b8d44574c4a7b1f1e866f06f72f309674597b61ec67953e2d6
font_01_sfnt_off0000e4f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F1 10628 bytes
SHA-256: 133341396371ffeced3de74ce2f859182587d6b77ca7dc8d88272ee9e9a88f48

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