Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d13f44a902bf351…

MALICIOUS

PDF

65.5 KB Created: 2020-11-11 16:30:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8b9a92de83bee86fc8deea5eaa82c4fd SHA-1: deaeec4bea0ef8793f37c77bb646a5b0b0bca4b5 SHA-256: 8d13f44a902bf351fd8cc3f598007ed4f4aa5356ec112ab53f04459bba4fcab3
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=citing+google+images+in+apa+format In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414486/normal_5f9911418fa4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472185/normal_5faba42b1fb3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_5f990502d118d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5faa5b0f3e4af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384295/normal_5fa2af0a34726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471988/normal_5fa4b4cfb9082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417319/normal_5f9ccd975f42c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418985/normal_5f9980c8b21d2.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/fedufiporara/61696925705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37964f2c-459a-4834-a9c4-f09e27e7d4f2/digiwekirobuda.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/92823459527.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/carrie_pilby_book.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_off0000c5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BF 5124 bytes
SHA-256: 0dfcc0874ca9f59e346ffbf89a1a72e5543c3e9ecb5ddc0a11625683256b62f3
font_01_sfnt_off0000d716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD716 10072 bytes
SHA-256: 2f69378a5444ba8eb2ccedcafa8d8b27c2d8baa2a2e42f8feb3d8ca3a7ecfe3e