Malicious PDF — malware analysis report

Static analysis result for SHA-256 d31caeb39b500e31…

MALICIOUS

PDF

64.1 KB Created: 2021-02-05 01:56:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bfa84f95d31fe8409409b68ea78bcc28 SHA-1: 57852a9fcd808efa2e179187be5645af343ff4a5 SHA-256: d31caeb39b500e31978b7b2b4ff0d41cf70bf81a51edab46cd8cb068e173c97d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site.

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
  • 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://baarspo.ru/wb?keyword=differential%20equations%20textbook%20answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403937/normal_5fd12baacca80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388283/normal_5fdb9b40a281d.pdfIn PDF document text
    • https://cdn.sqhk.co/najafizox/ifgigjc/vintage_rolling_stones_shirt_womens.pdfIn PDF document text
    • https://cdn.sqhk.co/zevukodixu/hgwsjjb/32295175230.pdfIn PDF document text
    • https://cdn.sqhk.co/tetaxekumipi/dxoijjd/joplin_missouri_population_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/dW2iecl/the_wish_app_coupons.pdfIn PDF document text
    • https://cdn.sqhk.co/depivuni/I5wG0ij/snow_skiing_in_north_carolina_map.pdfIn PDF document text
    • https://cdn.sqhk.co/ferudati/jbmngdu/dojibabosevekovemipirete.pdfIn PDF document text
    • https://cdn.sqhk.co/wejupexuput/6idn8ig/1346230026.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dijiwag.epizy.com/blaze_foley_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/49841457549.pdfIn PDF document text
    • http://gosonuvubunevo.epizy.com/ringtone_mom_calling_free.pdfIn PDF document text
    • http://muwalolerede.epizy.com/training_certificate_format_in_word.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/naretedaxulifixofiz.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/40295467829.pdfIn PDF document text
    • http://xevorerokune.epizy.com/kosini.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/lorraine_lea_percale_sheets.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_off0000bf2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2D 5252 bytes
SHA-256: 352774baf26aa7d6e636819cba8fe00f20bc21b5a21c8463e58c5b5c2af7147d
font_01_sfnt_off0000d136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD136 9908 bytes
SHA-256: 9bc457a10a6b2aebbb8027a1207fb6fade4169b066a8931da397874334b89c69