Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06ffb251e15c51e…

MALICIOUS

PDF

68.8 KB Created: 2020-11-19 04:14:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82ee95b1d3723d3ca37a4d6296b9982b SHA-1: 6a1c21becb3f15f1a1d9d4169888d44de9cd9bab SHA-256: d06ffb251e15c51e34e7f05618729aea3d3f28144ee9742e0c7da090b33ca6a3
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, which is flagged as malicious by heuristics and a machine learning classifier. The document body, though heavily obfuscated, appears to reference product costs, suggesting a phishing lure. The presence of an external URI points to an attempt to redirect the user to a malicious site.

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
  • 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://trafffi.ru/123?utm_term=dexcom+g6+receiver+cost
    • https://cdn-cms.f-static.net/uploads/4453909/normal_5f9f7f80d3cfa.pdf
    • https://fiwuvoreguno.weebly.com/uploads/1/3/4/0/134000104/007e98d.pdf
    • https://cdn-cms.f-static.net/uploads/4455374/normal_5fad5e08a475a.pdf
    • https://jutoduxozerepep.weebly.com/uploads/1/3/4/5/134599773/4763560.pdf
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/fedexi-tarilala-wesamuzuruxav-vugupimusede.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/43e9ed2a-4283-4009-88c6-82a5e996e31b/sagapofowiradipijobi.pdf
    • https://uploads.strikinglycdn.com/files/601edd15-10ef-420c-af47-239c9cae6f1f/lovusadene.pdf
    • https://uploads.strikinglycdn.com/files/1a5fb0ac-ddbd-45f8-8d16-bb6dfa72ac54/wexomo.pdf
    • https://uploads.strikinglycdn.com/files/0b3c5784-99b5-487c-b4ff-f0e9e8c25f02/canada_lonely_planet.pdf
    • https://uploads.strikinglycdn.com/files/342b665c-e130-4ad5-b85a-f5973c7a6d92/nevobimazujalavu.pdf
    • https://uploads.strikinglycdn.com/files/fab2e5e2-b23a-4f90-8a1e-2c342d5c5d7e/86406845285.pdf
    • https://uploads.strikinglycdn.com/files/98a46317-4e2b-44a0-9ee6-d15d5e09cf4a/fuxip.pdf
    • https://s3.amazonaws.com/jadere/38425508856.pdf
    • https://s3.amazonaws.com/fowonaxul/picture_of_thunderclan_camp.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce32.bin
78e60be46589f66c7be5ed310a4f195fd4528bdde3c16b15e47b479b162253af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE32 5160 bytes
font_01_sfnt_off0000dfbe.bin
a3eed544d38320bf5062ea38b4e2ddddf07bca57c3505188d2e9b948555d6121		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBE 11436 bytes

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