Malicious PDF — malware analysis report

Static analysis result for SHA-256 058193757d7beb35…

MALICIOUS

PDF

75.9 KB Created: 2020-11-17 21:51:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c0ccc2660fe861e6826aa02e52957a5e SHA-1: c9ab8df2dd898bc309afc0e1d49a3c9b1e219cc7 SHA-256: 058193757d7beb356d0b7ae24a69a1cfb7880ca28b1bed0fa69e041c09d0c9e9
154 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to a game walkthrough. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

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/123?utm_term=rise+of+the+runelords+walkthrough In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f959d89513d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424996/normal_5f9e8cf933b03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f87058ec274d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384633/normal_5fad5e007fbd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f8aaf2e7775a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419645/normal_5f9dc6f91cc56.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/zoxewudunigus/befanuluro.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/bugs_bunny_game_for_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/conversation_essay_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d680c382-0199-46c9-b02c-98a8b8334734/10500330238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cffc53e-dfd2-44bb-8d93-5e523f52de69/holy_bejesus_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab267bb-dd01-4b3a-8183-c1ae8d3b0102/95341734045.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/budaya_malu_jepang.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/kojixenavijod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75099fdc-4c91-4911-ac7c-9782d5ede5cd/chief_of_party_role.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_off0000ebf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF8 5332 bytes
SHA-256: 15107313078727263cb6fd9e32c5632969c2168f6d829bfa63a1c26410a996c2
font_01_sfnt_off0000fe2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2A 10144 bytes
SHA-256: c9618ff737a42e16fc2993ba49faac943ce887bc5448e6fad6f02d90ab7d1c63

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