PDF malware analysis — malicious · fc219cd0692b513b

MALICIOUS

PDF

96.2 KB Created: 2021-07-13 20:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 1845fb2a82bccb80e8eaed0a338a8783 SHA-1: 965b9f5dc64cb86b83f5c1d5021a212fc76bcffe SHA-256: fc219cd0692b513b563debe34c5ce3628e2723d831e8fcfb7cb8d24e1633048a

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating an embedded external URI. The primary IOC is a URL pointing to a suspicious domain, likely used for phishing or credential harvesting. No scripts were extracted, but the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 0.9894

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://chcial.ru/square?utm_term=how+to+write+a+personal+letter+of+recommendation+for+a+friend
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8d4f1e2705b436309978e/1625871601675/just_chit_chat.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eda1c6c0b9b61b597508e6/1626186182670/39373916550.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed2ea4f95b5524f950cb66/1626156709085/tirama.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7726c41361c2fc3ff6ddc/1625780844149/dr_cheng_endocrinologist.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7efc7e5cd11affcca9f0/1626111740561/6808468273.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edae6ef90efc25ed7608eb/1626189423121/appraisal_in_tagalog.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edb4f83680ef421b5718dd/1626191096398/legixutoniwajuvilewo.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8e98258c6623f037f3cb6/1625876866779/had_in_afrikaans.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8c041e534972f7b7994b1/1625866305650/best_quest_based_modpacks_minecraft.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_off0001185b.bin` `32926d393c2b8ccbd406b55e53334736ee2c0d9ce695a8c8288d88c0ad604c21`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1185B	16400 bytes
`font_01_sfnt_off000142d7.bin` `ae1bd08ed1962f6f0a3dedb017456ba36ef682b81b40149ab269c6b908d44013`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x142D7	10860 bytes
`font_02_sfnt_off00015bf3.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15BF3	16792 bytes

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