PDF malware analysis — malicious · f8acb1b6365708a5

MALICIOUS

PDF

71.2 KB Created: 2021-01-16 12:39:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16

MD5: fc13ad4acddbb0dcd5cf490c362307d9 SHA-1: 0bc633b8837608d287b25599fb302ba3786bd41f SHA-256: f8acb1b6365708a5e08bf47841760924f454fc32e1dec6def686fb82172385ce

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0'. An embedded URL, 'https://traffset.ru/123?utm_term=avast+cleanup+premium+activation+code', suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'Avast cleanup premium activation code', reinforcing the lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=avast+cleanup+premium+activation+code PDF link annotation
- https://cdn.sqhk.co/gonolesuzam/g9hgQaq/41871187895.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365551/normal_5fabcf601f134.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4410983/normal_5f93b52b335b6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389576/normal_5fbec38e5bd3d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4405202/normal_5fdef0cc28704.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387703/normal_5f8dfeb82436b.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/desenaz/eyfs_development_matters_parents_guide.pdfIn PDF document text
- https://s3.amazonaws.com/gekojulog/moxobelumer.pdfIn PDF document text
- https://s3.amazonaws.com/zalisujezajaje/igcse_business_studies_paper_2_sample_answers.pdfIn PDF document text
- https://s3.amazonaws.com/leributafa/european_data_protection_supervisor_annual_report.pdfIn PDF document text
- https://s3.amazonaws.com/bejideba/92573192605.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_off0000d95e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD95E	5268 bytes
SHA-256: `a34ad773564ec522d2643489f06df4ab99383f921e0ed37ec30d38e126aa766b`
`font_01_sfnt_off0000eb35.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB35	10808 bytes
SHA-256: `6e736f041d5cffd3387294d680fa3d88030cb8be990f35c5a8bd256b8c7fd637`

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