Malicious PDF — malware analysis report

Static analysis result for SHA-256 d58f3db676b217c7…

MALICIOUS

PDF

69.8 KB Created: 2021-01-05 06:10:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 3bfb0099cddd1f2e5b1dad118fe8abe3 SHA-1: eda329012080c7d6410cd268bf4e7da3531681ba SHA-256: d58f3db676b217c7c374761e9398f5ac71c8817bbe4bb6bddb3c83ea2f5b230b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, pointing to potentially malicious or phishing websites. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary attack pattern involves directing users to external resources, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/aws?utm_term=analyzing+correlations+worksheet+answers+psychology PDF link annotation
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/89311.pdfIn PDF document text
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/2610100.pdfIn PDF document text
    • https://jebunofom.weebly.com/uploads/1/3/4/4/134468214/ritomo-jugijur-lodifed.pdfIn PDF document text
    • https://supuniwugi.weebly.com/uploads/1/3/5/3/135317388/6f08404ed.pdfIn PDF document text
    • https://fitisasituwag.weebly.com/uploads/1/3/4/8/134846324/totanugor.pdfIn PDF document text
    • https://vilabusifa.weebly.com/uploads/1/3/0/7/130776169/favizin-towifojafer-mumoza.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/pogolo/collagen_mask_sheet_the_face_shop.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/36234203727.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/cartoon_hd_apk_version_3._0._2.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/ruvizuxim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2357fb1c-3575-43b9-af86-2594d6f4e407/wumowepuvijuxuzam.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/37845354346.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/instagram_story_template_photography.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_off0000d458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD458 5492 bytes
SHA-256: 1e36990876696544238b734a4c20130db9fab9cc3a3fa118f3fbfc7c452ac4f5
font_01_sfnt_off0000e72d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72D 10200 bytes
SHA-256: 442f1d38e3764c7896c9a498d3310b5706127f7bbf91bc10f89f19c508eaa3fb

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