PDF malware analysis — malicious · 401443569a57f8d3

MALICIOUS

PDF

80.8 KB Created: 2020-12-05 16:11:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 5728805dd477df707d9bb1346b540c5d SHA-1: b011a7f43c3b95a0c25e8aaacea6faf940161580 SHA-256: 401443569a57f8d3dd71a59a22e9f220fe1e990b68c1866c254f4f3ee3ca0560

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF containing an embedded URL that points to a suspicious domain. ML classifiers and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The presence of embedded URLs and the nature of the detection suggest an attempt to redirect the user to a malicious site for further compromise.

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/strik?utm_term=mississippi+state+athletic+conference PDF link annotation
- https://cdn-cms.f-static.net/uploads/4487191/normal_5fb0179a87490.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374835/normal_5f97240d73e31.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4505699/normal_5fb2b73e66109.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4449779/normal_5fca2b63f3089.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454051/normal_5fbb307e43bfe.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379476/normal_5fca2a99337d6.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4496153/normal_5fcaec30521dd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378846/normal_5f8c6aa7aec69.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/zobuwubedak/66592635170.pdfIn PDF document text
- https://s3.amazonaws.com/voxipanovigepiv/22265156443.pdfIn PDF document text
- https://static1.squarespace.com/static/5fc06b0d2e537a05ef0695ba/t/5fc17a06f8cdb769c61b65ea/1606515207964/proverbs_1_kjv_listen.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_off0000fc6a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC6A	5108 bytes
SHA-256: `a83a642076954bb950f3bac1fe6674595979c5796b532fc85eeec20f995066a2`
`font_01_sfnt_off00010dd4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DD4	11792 bytes
SHA-256: `5e8e32ddfdfc769750284492fdfaf192033cf434820fe7d4f04dd47fe41ead26`

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