Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb2b19883923937…

MALICIOUS

PDF

71.6 KB Created: 2020-11-17 17:42:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: fe51745656cf51d918f129d7da0a61a6 SHA-1: d439aa5d1d8062b026077504a0c02f12f758edc7 SHA-256: cdb2b198839239374a3873999bf2ac56c4aead432e61110d799d7694b3ed0571
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, trafffe.ru, which is likely used to host a malicious payload or redirect to a phishing site. The document body is heavily obfuscated, but the presence of the external URI and the high confidence threat detection indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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=a+love+to+last+september+15+2018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455914/normal_5faa660f9408b.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/jowutoneranemuk/vazemekof.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/jowaveloxeleweponolapo.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/18138560062.pdfIn PDF document text
    • https://s3.amazonaws.com/suzitivasekoga/vigutigapadila.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/79141126778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/956c4a01-c119-4288-91f6-da104bcf89bb/what_natural_resources_are_found_in_europe.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/antonyms_worksheet_for_2nd_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f95c138-a622-4cfc-a7b2-2399488bfb83/faromib.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.

FilenameKindSourceSize
font_00_sfnt_off0000da30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA30 5796 bytes
SHA-256: f6051a5adbb76e8730f0f7d27175b68b1a8d524e84b5c09307ecaee627a6278a
font_01_sfnt_off0000ede2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE2 10772 bytes
SHA-256: 66035088b6ac2af1df2354dce120467b43129644687e664b1ff1e26706551f5b

Open this report in the interactive analyzer, or submit your own file for analysis.