Malicious PDF — malware analysis report

Static analysis result for SHA-256 0555e8ae46e62d82…

MALICIOUS

PDF

66.9 KB Created: 2021-02-20 01:59:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 5bd2e1bb520967dc1080459ed0d3e238 SHA-1: d0adee7da4f1d05982c4f0ded715b2d6b504fcd6 SHA-256: 0555e8ae46e62d82e076738d5dde219db21dc259b541390b6a23c84aac79a4f3
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one notable example being https://baarspo.ru/strik, suggesting it acts as a lure to external malicious sites. The PDF structure and embedded links indicate a phishing or malware distribution attempt, likely using a link farm to obscure the final destination.

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
  • 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://baarspo.ru/strik?utm_term=behold+our+god+guitar+chords+easy PDF link annotation
    • http://momentshop.space/bootstrap_css_login_templates_freekk426.pdfIn PDF document text
    • http://cuzinfo.ru/nazipalokeleboc2oxu.pdfIn PDF document text
    • https://gemiporelowagi.weebly.com/uploads/1/3/0/7/130775846/repuwa_dolopare_wumemogegiz_wokerudoxapita.pdfIn PDF document text
    • https://sukizasatesez.weebly.com/uploads/1/3/4/6/134686833/nubinon-bapaxemowujuge.pdfIn PDF document text
    • http://frut-tree.site/zefaximisigisasuzst66d.pdfIn PDF document text
    • https://zebakikalelu.weebly.com/uploads/1/3/0/7/130775248/govijosafebovan_limotiw_xewuraridelos.pdfIn PDF document text
    • http://copyright-notice-ig.com/508021107062mee7.pdfIn PDF document text
    • https://sadepejeriroxet.weebly.com/uploads/1/3/5/3/135337628/zilozujakimoti.pdfIn PDF document text
    • http://ottics.ru/pisiludogawoguzifikiwaxixd16b7.pdfIn PDF document text
    • http://wusodopepufex.66ghz.com/a_p_name_images.pdfIn PDF document text
    • https://napuguvu.weebly.com/uploads/1/3/0/9/130969658/9b857.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feworoborisadej.epizy.com/47414563836.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/99620136270.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/post_form_using_jquery_ajax_php.pdfIn PDF document text
    • http://vanakodezifezuv.epizy.com/malerofozibibiji.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/bodybuilding_workout_plan_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/pisewojil.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_off0000c8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E3 5352 bytes
SHA-256: 0132afb6ffb9ea4e21265a71dded964064eba32199f19adcaea88455e73d9f4a
font_01_sfnt_off0000db19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB19 10296 bytes
SHA-256: 360c32cfea2880f2078d820241456ffe5333c3100db6565ab136893be1173bd0

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