PDF malware analysis — malicious · 43106662c8db1e7d

MALICIOUS

PDF

74.1 KB Created: 2021-01-15 12:50:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27

MD5: 9613a371da8808cb25f890a743e6b134 SHA-1: d5d97543bb6b6e689ded88af6668ad4f8aaa4b69 SHA-256: 43106662c8db1e7dd4519cb76329348ff0e8c874aa6958a3b2bcc3c0d2240437

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of an external URI. The embedded URL, https://trafffi.ru/123?utm_term=chase+foreign+currency+rate, suggests a phishing attempt related to financial information or job opportunities. Although no scripts were explicitly extracted, the PDF structure and the nature of the URL point towards a phishing lure, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=chase+foreign+currency+rate PDF link annotation
- https://static.s123-cdn-static.com/uploads/4488130/normal_5fde65b507640.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4444885/normal_5ff9d12c9d682.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385206/normal_5f9d482c0efa6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4480736/normal_5fa936c85be5e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4469860/normal_5faa127bbb66e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457560/normal_5fb5a7558bb3a.pdfIn PDF document text
- https://cdn.sqhk.co/bafesugoguwi/ifkBgik/entry_level_advertising_jobs_los_angeles.pdfIn PDF document text
- https://site-1174654.mozfiles.com/files/1174654/38714762371.pdfIn PDF document text
- https://site-1178025.mozfiles.com/files/1178025/become_a_court_reporter_in_sc.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/titugome/kikidorodirevifowi.pdfIn PDF document text
- https://s3.amazonaws.com/xamibudasagas/debowitiridekutunul.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_off0000e65f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE65F	5116 bytes
SHA-256: `2f82706b357878f4bcbb8076d8062c79c478b72d1afea802bc9c48de4542e0d0`
`font_01_sfnt_off0000f7cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7CC	10380 bytes
SHA-256: `44a34519294160351040a04723068deb7492e1be623bccf45c973d38c5fbc12b`

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