Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5a3581f4389889…

MALICIOUS

PDF

65.1 KB Created: 2021-02-24 21:47:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1352e25bcc50522cb6c03a4d9a0f4ef4 SHA-1: d9a1e52c3c183e4f01d11b2b383170cafa573f94 SHA-256: de5a3581f4389889fd37de846f2d9380393def5bd0b570e00b86526d47515171
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains an embedded URL that leads to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The PDF structure and embedded content suggest an attempt to disguise malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • 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://jottigo.ru/wb?keyword=rain%20down%20jaime%20cortez%20piano PDF link annotation
    • http://believes.space/3958634525c19vp.pdfIn PDF document text
    • http://kazoxizodasese.iblogger.org/jibewobov.pdfIn PDF document text
    • https://zotizoju.weebly.com/uploads/1/3/5/3/135349435/nuzoso.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/best_printable_heat_transfer_vinyl_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/boxepupovemu/iir6V0B/kuwodalaneketefunugik.pdfIn PDF document text
    • http://detonicufficiale.website/fully_loaded_android_box_irelandh4xwm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/4066430275.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/92197034813.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/nptel_civil_engineering_building_materials.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_off0000c3dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3DD 5232 bytes
SHA-256: 295cdc24906ddd49b2a9a8aca9488f124beb470ce9f240b032cd88b3b58219a5
font_01_sfnt_off0000d5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B9 10320 bytes
SHA-256: e526add7673caf9c63d3b35efa1e37078026fc768f1144abc39fbf651d946e5c

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