PDF malware analysis — malicious · cd6b98f5ce177061

MALICIOUS

PDF

73.0 KB Created: 2021-07-15 18:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 34203c039c631567cb776695737037c7 SHA-1: 6d66cbd174f80d7b92a279ae6cbc381cc9f93f8e SHA-256: cd6b98f5ce177061001db578aeb5ae1ee658e7ff63833c3b536973c63b3fc584

116 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic analysis identified a callback phishing lure, suggesting the document is designed to trick users into contacting a fraudulent entity. While no scripts were extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or social engineering attack.

Machine Learning

Nyx PDF Classifier malicious score 0.8216

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
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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://feedproxy.google.com/~r/sq/ugae/~3/nCRFBnYrBHY/square?utm_term=how+to+get+proof+of+address+for+bank+account
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed93f850566b3f86653994/1626182649059/viva_questions_for_c_programming_lab_with_answers.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e88ceda9e2ec49e0f92e14/1625853165470/40885246281.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec86545c244202458ba7e3/1626113620302/824269864.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f01561cd1cf129e16453f3/1626346849406/89385950543.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec82e2c8b0d544b6d79317/1626112738966/buku_harry_potter_and_the_cursed_child_bahasa_indonesia.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://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ba1e.bin` `fef7fd1e650ccc7ec4c976ad988c5d21ce284195948fda2f88d93bb34669f41e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBA1E	16472 bytes
`font_01_sfnt_off0000e49d.bin` `f60e843100cce0c211fb2908375e5922004fd8b5e30889143adca02775dd4855`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE49D	11064 bytes
`font_02_sfnt_off0000fe34.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE34	16792 bytes

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