Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8afc3fe7b28359c…

MALICIOUS

PDF

85.5 KB Created: 2021-02-24 03:17:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 113dc6b9e9ff88bc3a9f4d24107883c6 SHA-1: 5ab05bf8686fe989d97ac26f419c3d6796255736 SHA-256: b8afc3fe7b28359cca006a0c6ec7a6185381a0fe64f58dd26b36ad3a2655b714
226 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://bologen.ru/aws?utm_term=what+is+possible+theme+of+everyday+use PDF link annotation
    • http://profaudit32.ru/bezubaan_kabse_song_pagalworld6z1q1.pdfIn PDF document text
    • https://rofexigu.weebly.com/uploads/1/3/0/7/130738805/somavujiz.pdfIn PDF document text
    • https://gijowazav.weebly.com/uploads/1/3/4/0/134097260/5183712.pdfIn PDF document text
    • https://vezaruve.weebly.com/uploads/1/3/1/3/131378950/4167273.pdfIn PDF document text
    • http://trendmobile.ru/nifaregzjv9f.pdfIn PDF document text
    • http://bodyita.space/56393561949irfid.pdfIn PDF document text
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/xozevo-bigipotutoke-xufuvo.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/9hiiaZK/griselda_records_net_worth.pdfIn PDF document text
    • http://love-cosmetics.shop/minecraft_download_unblocked_at_school_1.12m3zn6.pdfIn PDF document text
    • https://fitisasituwag.weebly.com/uploads/1/3/4/8/134846324/2069703.pdfIn PDF document text
    • https://rojanudase.weebly.com/uploads/1/3/0/9/130969060/87de74.pdfIn PDF document text
    • http://paypallsecurity.com/tangled_before_ever_after_full_movie4exmx.pdfIn PDF document text
    • https://xatiletovolut.weebly.com/uploads/1/3/1/4/131409128/403b1.pdfIn PDF document text
    • http://aduo5.online/citroen_c4_grand_picasso_owners_manual_201153bvn.pdfIn PDF document text
    • https://kemovovem.weebly.com/uploads/1/3/1/4/131408999/ded73260.pdfIn PDF document text
    • https://merirano.weebly.com/uploads/1/3/2/7/132710628/zeruru.pdfIn PDF document text
    • https://zofawuzi.weebly.com/uploads/1/3/5/3/135323082/tisidigo_javapewirejal.pdfIn PDF document text
    • http://megantv.site/vox_ac15_headroomlrmei.pdfIn PDF document text
    • https://sawagifavemon.weebly.com/uploads/1/3/0/7/130775832/1470903.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D6 5596 bytes
SHA-256: 47121204deba8fe1c9146422109436007e913a0c3dc8b11396df9ad841a43a42
font_01_sfnt_off000125bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BF 10340 bytes
SHA-256: e5f0eff2ab4ee6c4b33f6f8f4e4a67e3e48bc002cb05ef547319e771f919d26e

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