Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c469cc3bea042f…

MALICIOUS

PDF

62.7 KB Created: 2020-11-20 08:30:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b1b568354288ad2e03abb4f113b069f6 SHA-1: 39cabd49bf77b14428d797e346f49900b8100b10 SHA-256: e8c469cc3bea042f83bd0f2c08876dc80a9bb0057ce0497ea4547e11127cbc97
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/aws?utm_term=balada+de+amor+ao+vento+texto+pdf'. This URL is known to host malicious content. The ML classifier also flagged this PDF with a high probability of being malicious. The embedded document body text is heavily obfuscated and unreadable, but the presence of a malicious URL strongly suggests a phishing or malware distribution attempt.

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://cctraff.ru/aws?utm_term=balada+de+amor+ao+vento+texto+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385026/normal_5f9cc1167e89f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384649/normal_5f8c7d3386c30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393026/normal_5fa170876734f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413570/normal_5fa3be0313a01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456165/normal_5fad3a29c8065.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/8a347928-9f27-4503-a31f-2fd9a3624739/53638016164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e7dbd1-d57f-4509-ab3d-3eaad31f59b1/10124566124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcdcef76-b4e6-46f3-bf91-711b2574b3d2/30198354250.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/11477553595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7667676-4883-4220-af63-98d9b758bf42/46086657883.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e69993a8-2857-44bc-ba3b-12881dcefc8b/luvawawisevedok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/260f8dff-e609-4137-8f9c-0372421b8e69/kenmore_elite_refrigerator_manual_top_freezer.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/321064120.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_off0000b66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB66F 5184 bytes
SHA-256: 4d29d4a2e9b0dfb82087beeb0f3547d7787384e557e8134f280d36ddf9c266de
font_01_sfnt_off0000c804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC804 11936 bytes
SHA-256: a805abdbf9aec162fd0e75752587936663761b9e79a9e6e3c6857d15627845b3

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