Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7fdf9f0aae3c64d…

MALICIOUS

PDF

70.4 KB Created: 2020-11-24 16:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8d7f907a94a5d7ef4d774d3d6eb89f5e SHA-1: 92257c1c99561f2f5f252876bf8de2e969029560 SHA-256: c7fdf9f0aae3c64d4abf86296c6c192042a0e938e426fc9e60d71c316c52c3fa
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'trafftec.ru', which is likely a phishing lure disguised with a seemingly innocuous query parameter related to a school football stadium. No scripts were extracted, but the presence of an external URI and the nature of the detection suggest a phishing attempt.

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://trafftec.ru/123?utm_term=starr%2527s+mill+high+school+football+stadium PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389107/normal_5f8e8397e8140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5fbcc279eaf24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469828/normal_5fa35692c3894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380213/normal_5f96dfe09b86d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379498/normal_5fbba92dc2be4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402932/normal_5fae9ae86da48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385862/normal_5f95337ccf3ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448713/normal_5fb6d6d1489c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f887ce931bce.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/mubemutolewe/separation_pay_after_reenlisting_on_les_navy.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/13392578891.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/busted_year_3000_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a57a4e22-b6fb-4fbd-9b78-5573c4e78f36/25989620553.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_off0000d4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E3 5712 bytes
SHA-256: 5f5db6a94089f5c74c34696f6f982d14ce42d8781af4a996a545f1b4388f3910
font_01_sfnt_off0000e828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE828 10552 bytes
SHA-256: 6aefb88d51be0b611de047661c6a73c8b7e31b692d9051976c275f63c567b65c