Malicious PDF — malware analysis report

Static analysis result for SHA-256 230fc0e1eeab92be…

MALICIOUS

PDF

74.1 KB Created: 2021-01-01 05:14:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a4c552468db65430044d6e8b74427896 SHA-1: 8290a69fd2b0bfb4b7f01a9b7f12aff3bc97a122 SHA-256: 230fc0e1eeab92bef281a744a7f97af2dc8dbf0d1470813afa9200272c6a2a23
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://traffking.ru/strik?utm_term=slicers+fire+acronym'. This URL is the primary indicator of malicious intent, suggesting the document is designed to lure users to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffking.ru/strik?utm_term=slicers+fire+acronym In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5fab9f4344323.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417413/normal_5fd625b2366be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410702/normal_5fd126e39dc2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378853/normal_5f97b82c9ff6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453528/normal_5fe7d21fcd8e0.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/3e946b49-a369-4c0d-8765-b73e4e902c94/dotuxadarabiditipimov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bfcb865-dc70-432f-ac9f-2746637518d1/92163322422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b242ce2a-2ef2-4196-84ec-bf761d6b7d48/vavaxavopidoxugabapobob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/034f6b7f-7d63-46ef-8679-6f9256b5f3db/234223303.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/mass_effect_1_kaidan_romance_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/912db430-5e8a-4624-a993-4ab3deac1642/32609330475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3125b2b2-90de-4fe2-a6e7-94a005693bf7/lego_pharaohs_quest_sphinx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6587e3ae-ec5e-4af7-a329-c091f5fa40dd/triage_consulting_internship.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0574dce5-dd4c-4629-8b6f-75fb1d7aae31/15873570984.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_off0000e248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE248 5232 bytes
SHA-256: de7502ad5afa776ee24a450a5d43e492b1f92f3760752197a255a0b40e4b753e
font_01_sfnt_off0000f40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40B 11304 bytes
SHA-256: a804ff4bb03df43d70a21f8358b70b14897d7d49894eed6b3bcdc993a4d749a0

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