PDF malware analysis — malicious · c3589758a8cc51a7

MALICIOUS

PDF

66.1 KB Created: 2020-11-26 15:46:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 3402a0e3b0f0266f1c8a5da430e80121 SHA-1: cc603bfa4896a95b336af53611fc8a486441d97c SHA-256: c3589758a8cc51a79c67a86eec6b67e3bea573bce3f5957025daa859d88b7cf7

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a lure related to a "Heartbeat sound effect". The presence of an external URI indicates an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/aws?utm_term=heartbeat+sound+effect PDF link annotation
- https://cdn-cms.f-static.net/uploads/4369933/normal_5f8a342e7194a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471475/normal_5fa77c09a798c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4447108/normal_5fa49dddb251c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382004/normal_5f8df3faefcb8.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/zaxuledo/vobimozenemap.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0c9ddb0e-cf49-4b94-b8f8-5ead775c194e/drinking_gourd_lyrics.pdfIn PDF document text
- https://s3.amazonaws.com/fekazudabo/parinelapizolitadadig.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/62bfa23d-d7ca-42c3-831d-053d0adcf4cf/99704740808.pdfIn PDF document text
- https://s3.amazonaws.com/jexijer/71951950599.pdfIn PDF document text
- https://s3.amazonaws.com/wapabefizosumi/android_bindservice_sample.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/31b5caf5-d51f-4f23-b369-f9b771ca37f2/8841095471.pdfIn PDF document text
- https://s3.amazonaws.com/latufenaw/77142333738.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_off0000c94f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC94F	5084 bytes
SHA-256: `22a8307adce598fe9b8997101a3a016daf10cb12b739fdc2306da0e3e381991b`
`font_01_sfnt_off0000daa1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDAA1	9784 bytes
SHA-256: `277d7fd9ff263afe75696fef215594078e8fd864adc169f025f90192d368465e`

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