Malicious PDF — malware analysis report

Static analysis result for SHA-256 8566e02dda148310…

MALICIOUS

PDF

72.8 KB Created: 2020-12-22 04:26:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9e31872a92cc15ff8772e6dff879e531 SHA-1: 7dfeab6440c49464b5d2311518db22ce91a90687 SHA-256: 8566e02dda148310549258fc3f1a3a6607713cd0f60b3f17fc2e0a89bc78f1c9
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating an external URI and is flagged by a machine learning classifier and ClamAV as malicious. The embedded URL, 'https://traffset.ru/strik?utm_term=quiz+frame+clash+royale+answers', likely serves as a lure for phishing or malware distribution. No scripts were extracted, but the presence of a malicious URL in a PDF document strongly suggests a phishing or redirection attack.

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
  • 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://traffset.ru/strik?utm_term=quiz+frame+clash+royale+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447450/normal_5fd25384550c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5f87e33ccc165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478125/normal_5faad7d7278bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485809/normal_5fcebb0a9625b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475375/normal_5fbdcff6d4361.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389090/normal_5fbbdfd143929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372681/normal_5f89dbbe2208a.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/xelimewat/nagatani-en_mushi_nabe.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/jupalikarubifijovotalu.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/ciliary_muscle_eye_function.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/all_games_store.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcb8173599a867de449200/t/5fdcf36a1223dd373659d997/1608315755660/guxabavisujuza.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/ximaxofusewa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe11eb4f82093382821b8cf/t/5fe158e9c34a2a2a7c891610/1608603882417/benomugomiwokuwodina.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f4615687f52b6b8e9594/t/5fc48aab18e72e5fdb69b79b/1606716075202/93716619172.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_off0000de73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE73 5424 bytes
SHA-256: 8cf4c5134b9058c0ace68ce2c912b564f440bf315202858184bc3e180bde23c1
font_01_sfnt_off0000f0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DC 10880 bytes
SHA-256: 4d8b26e16cff596c5b96afdad720c6e30a1a7d233d70358ea561c2e9a48d464f

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