PDF malware analysis — malicious · b76c29f539c39543

MALICIOUS

PDF

67.0 KB Created: 2020-12-17 11:13:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12

MD5: 7803b2a1d48caf6797dbfacb6e45c05e SHA-1: 8b9fe5b438e5c2a7515beb374717c7eb550c9a2b SHA-256: b76c29f539c39543e97058ae13118edf2e151f84d45a960e2984d1868eee4f1a

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 URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, suggests a lure related to 'Capulets vs montagues quotes', likely a pretext to drive users to the malicious URL.

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://trafffe.ru/123?utm_term=capulets+vs+montagues+quotes PDF link annotation
- https://cdn-cms.f-static.net/uploads/4383923/normal_5fd335f61783e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382414/normal_5f932c62de5b5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4476122/normal_5fa79bde90331.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4410416/normal_5fb9144e56aa0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4448129/normal_5fa81cd52dc8f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409819/normal_5fa72e7d075fc.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/8c0e3a56-1dc9-4cb0-a2cb-2b2f0e85a642/35365631678.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/806d7668-b65a-45d5-b9c7-6199baad85db/40843639142.pdfIn PDF document text
- https://s3.amazonaws.com/jixerubowi/doterra_essential_oils_handbook.pdfIn PDF document text
- https://static1.squarespace.com/static/5fce91839644eb60c29ce080/t/5fd14abddc9b9c3e28b00a2b/1607551680149/nostalgia_critic_episodes.pdfIn PDF document text
- https://s3.amazonaws.com/mokixetat/mizafifununofagokufek.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_off0000cbec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCBEC	5132 bytes
SHA-256: `54ed2cc6bf6ec7c89cdbbb997cbfc233143aba79000d2c261578512fa97287a8`
`font_01_sfnt_off0000dd55.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD55	9912 bytes
SHA-256: `70aa1ab555871f838a21225d55c5e30f23861abdde5c60a7bc79b15b2e7e1095`

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