Malicious PDF — malware analysis report

Static analysis result for SHA-256 a101076e6f84bd25…

MALICIOUS

PDF

46.5 KB Created: 2020-11-02 15:24:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 66f02033c7a7d3bc3527f4956768ee04 SHA-1: 1690f1c1eb24305fcf73a6bd354a1a6fb4b95b6f SHA-256: a101076e6f84bd25b17b975fa9038470e5282e27b072a418fe102f7f23c2a813
94 Risk Score

Malware Insights

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

The PDF contains a link disguised as information about an Android launcher app, which redirects to a known malicious URL. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded link suggest a phishing or redirection attempt to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ttraff.me/123?keyword=best+android+launcher+app+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5f95a823daec4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_5f939d7825597.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/1ce0084f-e7bf-4b82-9fdd-cdcddd1206a6/48799495348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adbf48da-2114-4a31-8bd5-579da5102612/90360443687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f5d3e44-a872-49cf-9a0f-6e5b1926cc55/97121435180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe03e6e5-f7e0-49c9-9e2f-47c998f2072f/capitale_de_la_douleur_paul_eluard_analyse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89d24d39-1b72-49db-9675-fd8d6bf4f5f6/79484365578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ad1cb5-69da-4f04-8ae5-4159065e4906/vodimotevuwem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99587d1f-3525-4e52-b4c2-34976ed5302b/89993323176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/258270be-739e-498c-803e-4f243c619eee/21631803372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e92a0be-4e9f-425b-91ea-b1dd21db525d/47222854005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7729a72b-deea-4421-ae64-2a070baed99e/28861271395.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_off000074e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E6 5692 bytes
SHA-256: 4821fb957d59334732fa317382cd78f19e78aed721199a07d0864cf14e637e20
font_01_sfnt_off00008846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8846 10848 bytes
SHA-256: 72537862cd579cf079237920196d1e86fba45ede90fdc69c06298e3c63cd1016