Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab3be5cdda36ec5…

MALICIOUS

PDF

75.6 KB Created: 2021-03-12 19:44:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6aeb0e338206f4f0e6b95ea20d2aa0f2 SHA-1: 96488ad4b0fed9e16a928bbb1797c8aae573661b SHA-256: 2ab3be5cdda36ec5cb8765969c792e8d07c791a8c010975cd4b309deb97e6039
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary external URI pointing to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body, though heavily obfuscated, suggests a lure related to religious text comparisons to entice clicks on the malicious links.

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://golowaki.ru/strik?utm_term=what+are+the+differences+between+the+bible+and+the+quran PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496360/normal_5fce04587d3ea.pdfIn PDF document text
    • https://cdn.sqhk.co/jovakuki/hjgeugh/american_truck_simulator_2020_mods.pdfIn PDF document text
    • http://leon-stavki.info/50923720225lyxfh.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuwatipo/KggdIgh/view_html_source_chrome_android.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/gcPLqjh/15134148767.pdfIn PDF document text
    • http://sallehub.xyz/52901088999tqrwd.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/SieyheP/ratotagazapivarixofa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447658/normal_6004bd3f73adf.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/g0MhhXg/best_background_video_recorder_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/501f58d1-3d67-48b5-9129-36138d5d3cc2/dd_4e_avenger_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bed1572-81bd-4bae-be80-e8cebef5ccf0/what_is_the_standard_deductions_for_2020.pdfIn PDF document text
    • http://zutadefado.epizy.com/file_franchise_tax_report_texas.pdfIn PDF document text
    • http://dolanuvusipegu.myartsonline.com/nowobaluxuzovisedidavozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d741238-743c-43e6-806c-72fda66f7224/husky_60_gallon_air_compressor_parts.pdfIn PDF document text
    • http://bolunivagoxel.epizy.com/sovovofetuzebemakopoken.pdfIn PDF document text
    • http://gamelaluwer.myartsonline.com/84821389089.pdfIn PDF document text
    • http://widusop.atwebpages.com/22921287624.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_off0000e8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B7 5480 bytes
SHA-256: 9d17cbb31f28dc1ca3d468e1340acdbdda059c9a2f4250c1d63bb16a14876197
font_01_sfnt_off0000fb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6B 10960 bytes
SHA-256: e9a9eb2c8d75f680abfa53ce7943a61a0af5f59e07a0af80e5951cfe9ae51eca

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