Malicious PDF — malware analysis report

Static analysis result for SHA-256 f681e2d5ae545365…

MALICIOUS

PDF

74.2 KB Created: 2021-02-20 00:04:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f667744d88b8568a4fae3461ea8f95c0 SHA-1: 22aea09c892f09f504fefec937ac6f0a55bfb280 SHA-256: f681e2d5ae545365d5a44c6c134893cd79bb8d4887b9d495447ea2477a3a9712
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting services, suggesting a link farm or phishing attempt. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of many external URIs and the ML detection indicate a high likelihood of malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://druttle.ru/wb?keyword=a%20visit%20from%20the%20goon%20squad%20chapter%2012%20summary PDF link annotation
    • https://cdn.sqhk.co/wubunepan/pifAjhc/56126749070.pdfIn PDF document text
    • https://pefikasulanak.weebly.com/uploads/1/3/4/3/134350375/fadopenaxi-wamavud-kimoki.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/qieSYPj/rufizifinopugapado.pdfIn PDF document text
    • http://retaxigeg.iblogger.org/mapezure.pdfIn PDF document text
    • http://ferebamof.22web.org/ab_initio_method.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458161/normal_6026d06da2a5a.pdfIn PDF document text
    • https://garanokuwepo.weebly.com/uploads/1/3/0/8/130874617/9255147.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wobemiko.epizy.com/catalyst_3750_ios.pdfIn PDF document text
    • http://nifanokobo.epizy.com/does_the_2017_chrysler_pacifica_have_transmission_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/rimworld_ice_sheet_strategy.pdfIn PDF document text
    • http://detotoga.epizy.com/android_recyclerview_onclick_get_position.pdfIn PDF document text
    • http://zupupizejegujun.epizy.com/lopiwisekukixezanesifotad.pdfIn PDF document text
    • http://getetir.epizy.com/29084418208.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_off0000e407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE407 5996 bytes
SHA-256: 2c409ae0735e02744551db50ca6f6583e4677692c5878e0835296bcb223f6937
font_01_sfnt_off0000f858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF858 10388 bytes
SHA-256: 816940cdeaa9f0fe770f77d28ef443aaa3aa72ee4b55c9feba418d1cee78e17d

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