Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5a918154bbbc33…

MALICIOUS

PDF

73.2 KB Created: 2020-12-19 14:44:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 63c998fd63869f2e1feddce776f44eb9 SHA-1: 9688300a72014b6b5ce85d93bedf481a7d115c2d SHA-256: da5a918154bbbc3398984e724100b7b90ad54695a02d3ae60045e50627f9de19
136 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The primary malicious URL identified is 'https://trafffe.ru/aws?utm_term=film+peter+pan+1953'. While no scripts were extracted, the overall structure and detected heuristics strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/aws?utm_term=film+peter+pan+1953 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389582/normal_5fd9b82b7bd6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_5f9356d0a5ba0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412592/normal_5fa1ec9bbbd62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377381/normal_5fa3308ed5404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380539/normal_5fa64ae600f26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488569/normal_5fb2f0c725ec0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527902/normal_5fc452021c6fc.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/a4a6b8e8-8e6a-4885-89e2-d3e6040a8a48/16732770404.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/uses_of_isotopes_chemistry_form_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1be21b1b-4a38-458a-bb61-ebddb0f82193/relative_harmonic_minor_of_g_major.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/blackmart_alpha_2019_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/vscode_format_with_prettier.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/72430278204.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/10218791922.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/46871951836.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/firebase_push_notification_android_example_github.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/python_3._7_3_windows_64_bit.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_off0000e234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE234 5236 bytes
SHA-256: f7fa09c937a6b3ced7c6e7c1f225c34cebde7908dbff4040ff54533f229dbe0b
font_01_sfnt_off0000f3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F6 10696 bytes
SHA-256: 7741157369e64035f5a4647a0e3a6327fff5504499400bf601fdc8ee0e2e0f53