Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5ca9a690f39c83a…

MALICIOUS

PDF

69.7 KB Created: 2020-12-20 01:59:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f9a94628020b7a65cf16aa65aaf6eca1 SHA-1: 3bfeecd8e9f173175ebc96708b5d30002de7f911 SHA-256: b5ca9a690f39c83ab41a9223b4071f74f7f8905602b82fd27072724dbfff5eb8
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of a large number of external links, with the primary suspicious URL being https://traffnew.ru/strik?utm_term=creflo+dollar+pdf+drive. This suggests the document is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffnew.ru/strik?utm_term=creflo+dollar+pdf+drive PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451927/normal_5fa35949e2e2c.pdfIn PDF document text
    • https://texelepetorabaj.weebly.com/uploads/1/3/4/7/134738155/29efec93240a4a8.pdfIn PDF document text
    • https://deremorukoj.weebly.com/uploads/1/3/4/4/134490203/xipitowibiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5f8a481aea2bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5f937425973a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388617/normal_5fadfda5b137c.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/bofake/51216454598.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5282a5687f52b6b9ce1a7/t/5fcdc15133187724c4114fd0/1607319889745/voice_recorder_effects_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5352bffc-4944-4cc3-b03c-573bd0582de3/58312328604.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc19093ff13940aa2445166/t/5fc57f337acac6192a7d35cd/1606778676540/usda_treatment_manual.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_off0000d524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD524 4824 bytes
SHA-256: 1bb248386079be0511bb23245b0049d741dfe323d817cf64239569cf759f5cd6
font_01_sfnt_off0000e59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59E 10736 bytes
SHA-256: 500aee87a9460c12a136052e68431275bad6c43a56cf95ac2862e606b24e5f06

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