PDF malware analysis — malicious · c707c86906a60847

MALICIOUS

PDF

86.3 KB Created: 2021-01-04 18:55:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11

MD5: f804f8b8d2af872be430614184eca67d SHA-1: b3f6655dac6d7a4dd01f524199a8fe63bd607fea SHA-256: c707c86906a608473289c8b35cede274104fedb130b803e65ccb1471680abcca

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 pointing to a suspicious domain, identified as malicious by ClamAV and a machine learning classifier. The document body, though heavily obfuscated, suggests a lure related to a 'project report'. The presence of an external URI heuristic further supports the malicious intent of directing users to a potentially harmful website.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://trafffe.ru/aws?utm_term=cast+iron+foundry+project+report PDF link annotation
- https://cdn-cms.f-static.net/uploads/4480905/normal_5fda2d2d81ef7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4406170/normal_5f95ea61a6169.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/28cc0e4f-8dde-4d9a-862f-3f2a538020ab/83532410793.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bdcc5838-36c2-4c1d-aafb-37055ca41c77/hackers_mod_apk_1.208.pdfIn PDF document text
- https://s3.amazonaws.com/tutapaxi/general_training_module_practice_test_1_answers.pdfIn PDF document text
- https://s3.amazonaws.com/rowubunak/duretiwubofaxu.pdfIn PDF document text
- https://s3.amazonaws.com/sukedil/jpg_to_online_converter_small_size.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/94ee1bde-19a4-4efd-9b0d-de4e8cda2f55/environmental_science_cunningham_13th_edition.pdfIn PDF document text
- https://s3.amazonaws.com/tekujel/villa_savoye_site_analysis.pdfIn PDF document text
- https://s3.amazonaws.com/lebaxa/tatanaxabujotek.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00011694.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11694	5200 bytes
SHA-256: `a191702197a77e8812981371b0fc4cca97a5620badfa681aab0bcac2a0788fb2`
`font_01_sfnt_off00012861.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12861	10672 bytes
SHA-256: `3784caab5b773260ced2a79981a383c573c686c982a9ae60917125ddfff380f6`

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