PDF malware analysis — malicious · 61dbfe865f93fa4c

MALICIOUS

PDF

77.0 KB Created: 2021-07-12 22:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 94f26927fedb25d83707196dd1242471 SHA-1: 87bacf0f3c32517d43287d4564b2891085846cf3 SHA-256: 61dbfe865f93fa4c41a3d37f9a076f73d1b9b23c94ae81be843b2a472e3545ed

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is a PDF that contains an embedded URL pointing to an unknown reputation domain, which is flagged by heuristics as malicious and by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The PDF structure and embedded content suggest it's designed to trick users into visiting the malicious URL, likely for further exploitation or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9680

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://infrive.ru/square?utm_term=psiphon+apk+for+pc
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec8e3080388a1034d7e239/1626115633022/quantum_mechanics_perturbation_theory_problems_and_solutions.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec89580d838b6c850d87dd/1626114392167/chicken_and_bacon_skewers.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e94483e51f1f218d6b1910/1625900163912/growing_roses_with_potatoes.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e90d2937da2614570d612c/1625885993273/25544750737.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec860fa1f8f93f64ac0bff/1626113551170/burikixukuteworaxopewefez.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8304769e16759cf790b94/1625829447282/vitupumiseputuma.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec7a80dbb514329fae3d74/1626110592538/23666397116.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8d7580388a1034d7cff2/1626115445543/probability_questions_and_answers_grade_6.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_off0000cf0e.bin` `33ecda7edb4172db21ad5e098d530b1a464c86562b657b9bd91e7625aea09b06`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF0E	10396 bytes
`font_01_sfnt_off0000e683.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE683	16792 bytes
`font_02_sfnt_off0000fe95.bin` `8bba115a0b61cdbf0c2d351c936f2001c925438dbd6481def1fc14009e1117aa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE95	16080 bytes

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