Malicious PDF — malware analysis report

Static analysis result for SHA-256 663d9f97179eafdc…

MALICIOUS

PDF

65.0 KB Created: 2020-12-26 14:06:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 549e31df50f81b56b42500c82116740d SHA-1: 913e1937654029da7757ef35b12bcc98316e7465 SHA-256: 663d9f97179eafdca99f12bd6070521f69ebdb94e7b1fc33f4770ecf818618f2
96 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?utm_term=section+2+electricity+and+magnetism+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490523/normal_5fd0456e4cba8.pdfIn PDF document text
    • https://cdn.sqhk.co/modebopogut/dRdmZij/kigufafujam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_5f8762cc18a07.pdfIn PDF document text
    • https://lafasajuju.weebly.com/uploads/1/3/4/0/134017903/gaferuz_gewasam_leligamolata.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/d6302ad5-c57d-4c9b-8f86-e083c6772290/27380005771.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/zitorex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3806922-b0a3-451b-8f5f-797582ec882b/lexavidig.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/tuwepomanujejezuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f25dcc6b-b3d9-44af-9f48-a64d9e42795f/sample_franchise_agreement_for_milk_tea.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_off0000c2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C9 5752 bytes
SHA-256: 3124be80de9a9115ba7899dae8f95ab829d30795704088d5ce2d9c1ea1f04201
font_01_sfnt_off0000d668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD668 9584 bytes
SHA-256: 7ed86643225975c25473e7b768dbc685643fa484e76c5b7bca5b776e39e85a4e

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