Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb397410be74979d…

MALICIOUS

PDF

164.4 KB Created: 2021-02-22 09:46:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 59ff7068fae14c0e4f2c4768d4ba7ab7 SHA-1: aed0bfdd2a8baadbe22f42fcb7b96441a24e20e7 SHA-256: fb397410be74979d6c97eb0a374e2a2953cfc90698a1f09e5f36e65f095bc4f0
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs, many hosted on disposable domains and employing UTM parameters, strongly suggests a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/123?utm_term=que+es+el+paraclito+segun+la+biblia PDF link annotation
    • https://cdn.sqhk.co/rekutadis/amGheSZ/facebook_analytics_api_php.pdfIn PDF document text
    • http://carbags.site/35139820187bwqxo.pdfIn PDF document text
    • https://cdn.sqhk.co/kamavedes/dwG1UWf/lighthouse_cafe_menu_streetman_tx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476939/normal_5fe087c478ea2.pdfIn PDF document text
    • https://xoxekoxezugox.weebly.com/uploads/1/3/0/7/130738790/ragiboxila-nunag-gobivopoxevi.pdfIn PDF document text
    • https://susejovidexoxi.weebly.com/uploads/1/3/0/7/130775922/wonedexe-mefinudawa-netawe-jatogekopenep.pdfIn PDF document text
    • http://musofiron.ru/medical_terminology_20205kgnp.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/cgdpXgj/75204323630.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459175/normal_5fe046b2532e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407062/normal_600eb5f1d092f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501804/normal_5fc7c09a17aef.pdfIn PDF document text
    • http://securespot.ru/how_to_write_a_novel_free_downloadjh0mh.pdfIn PDF document text
    • https://lojexidipiwakif.weebly.com/uploads/1/3/4/0/134041559/juwetituzito.pdfIn PDF document text
    • https://cdn.sqhk.co/sugezigo/iaibggz/hearts_of_iron_4_tutorial_germany.pdfIn PDF document text
    • https://cdn.sqhk.co/tavanaru/tYhbhic/58588946693.pdfIn PDF document text
    • https://visofamawuri.weebly.com/uploads/1/3/2/3/132303269/zirazokosinadak_wudozogez.pdfIn PDF document text
    • http://vknart.xyz/diary_of_oxygen_thief_downloadhf5t8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499005/normal_60310943f04a6.pdfIn PDF document text
    • http://smartline58.ru/what_does_the_r_in_the_acronym_par-q_stand_for414l7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pubopelej/banjo_songs_at_320kbps_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/php_mysql_insert_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/abdominal_aortic_aneurysm_guidelines_ppt.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000218d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x218D1 5184 bytes
SHA-256: a9deb0cc08aaacf38c476143686847ac293dc95f1a1a32507d52e3486f27f7d8
font_01_sfnt_off00022a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22A80 15628 bytes
SHA-256: a34e64b0cad607ac3f578c176a3e51aa99ec7e7f00b1c69a8fde2174740ecae2
font_02_sfnt_off00025c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25C9E 16560 bytes
SHA-256: 1e93c9b882006839e068bacc0088825db271a34269bec0755a794d5a6a9b8d21
font_03_sfnt_off00027331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27331 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333