Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad77b694bfd6ebc5…

MALICIOUS

PDF

67.7 KB Created: 2020-12-21 08:49:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6d8bd772be474b0f0267ae4f89d1d377 SHA-1: 3fcef07ea9ffe3fbae1f1615ad568e551e295a8a SHA-256: ad77b694bfd6ebc5adc729c84033475f4c477ff77b4f69f4ba463844aa02e1e1
104 Risk Score
Tags
free-cdn-ebook-manual-lure

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 and a visual download button. The embedded URL, https://trafffi.ru/strik?utm_term=oliver+the+virtual+cat+hack+apk, is the primary indicator of a malicious download attempt. While no scripts were explicitly extracted, the PDF structure and the nature of the URL suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=oliver+the+virtual+cat+hack+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382197/normal_5f94bd97f08aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391893/normal_5fd5f67b768e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415518/normal_5fd1fca1b566f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f874c55beadc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453338/normal_5fb39c7f7ca95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5fc1a6799aaa4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbffc42bda9c57a97b92422/t/5fc0f9bd9d79364840b03c08/1606482367002/bujepabamu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc33ed640f1034a5cb81b15/t/5fc6f46bad3e64119238fa3b/1606874221164/bomudov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/571c8e60-c9c3-4700-94ba-5806c6f5d0d7/58863939767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bd79003-9fb2-4946-a44e-e22a3fee2004/20702142309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a91c377-be77-45dc-be12-f9dc3ed2c39c/gafewaroxorawili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/960cd279-4b6e-46e7-9130-e2cbb3f58898/eminem_i_need_a_doctor_live.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/card_background_design_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f09fe2fce462bc994906/t/5fc569a83c02f22b9dc2c820/1606773164034/word_form_errors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cc84176-4673-4490-87ff-28271b5646b3/my_navy_portal_e_learning.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_off0000ca83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA83 4996 bytes
SHA-256: 4e4581cab38eec55d4935b00e8d5e4bef6f53955770adda705f3e9e596c93131
font_01_sfnt_off0000db7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7E 11324 bytes
SHA-256: 7cc733166e7b270c88bcb337915021122c7de98aa16ccaba698121914a1cc209

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