Malicious PDF — malware analysis report

Static analysis result for SHA-256 15120532806161f2…

MALICIOUS

PDF

73.4 KB Created: 2021-02-19 08:23:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f24f21e1de5266aaa2eb3f97357b2e82 SHA-1: a4d63f6f71193e5851e58140dcc73bb9e2c5ccab SHA-256: 15120532806161f22afabea1f8c64687a735dd4f3c56a33c9ad81c3da7c36d50
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure. Heuristics indicate a browser extension installation lure, a common social-engineering tactic for malware delivery. The ML classifier strongly flags this PDF as malicious, and ClamAV confirms detection as a phishing trojan. The document body, though heavily obfuscated, contains strings related to 'shell shockers hacks 2019' and application metadata, suggesting a lure to exploit interest in such topics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wix?keyword=shell+shockers+hacks+2019 In PDF document text
    • http://vinamituloj.22web.org/mefikunisipusisudovewu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411714/normal_5fd05f2cc70ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393514/normal_5fef83becce03.pdfIn PDF document text
    • http://mimedilubaj.22web.org/aspirin_different_dosage_forms.pdfIn PDF document text
    • https://cdn.sqhk.co/fupokonabat/egfKjfk/86671516251.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486221/normal_5ff86600d3b64.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/jiw2l4Y/baby_shark_running_cadence.pdfIn PDF document text
    • https://cdn.sqhk.co/xonudutixova/aFZ0haL/subway_simulator_prague_metro_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/iubHcxT/rexuzukoxisatadewanajem.pdfIn PDF document text
    • http://wukivobezoba.iblogger.org/siwakujefolufirig.pdfIn PDF document text
    • http://feviziwomuta.iblogger.org/rejejede.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/0SoEgh2/vp_racing_gas_nozzle.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383704/normal_5ff20890442ac.pdfIn PDF document text
    • http://nokewobepasag.22web.org/what_are_the_books_of_law_in_the_old_testament.pdfIn PDF document text
    • https://cdn.sqhk.co/wopidevepip/1qTicia/68892639819.pdfIn PDF document text
    • https://cdn.sqhk.co/woxiwovar/gejhYjj/summer_2020_nail_trends_pinterest.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://resisimokopi.epizy.com/xonosagab.pdfIn PDF document text
    • http://jozizirepimetel.rf.gd/27593355068.pdfIn PDF document text
    • http://gusalixofunek.epizy.com/31083659273.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_off0000e311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE311 5536 bytes
SHA-256: e3369f87c25ee659c5fccda0abed4a1bcb7ccb432bc79d1835aa7746f8cdb2ec
font_01_sfnt_off0000f5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DD 10084 bytes
SHA-256: e0234f1fac2b1f101b3051de02f080c533ddaecc7ba7b83d81dd280300206593

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