Malicious PDF — malware analysis report

Static analysis result for SHA-256 48b20820e4a82b49…

MALICIOUS

PDF

66.9 KB Created: 2021-01-24 01:20:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7e73270ff9ee78f95889a3affc0b6eae SHA-1: 1788eeac45c7028d209ef97d05f8e98a30c8987f SHA-256: 48b20820e4a82b499c73e51c8c576d3fcdbe4bc03ee959dd6adfeff71cc768c8
126 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, with several pointing to potentially malicious domains or link farms. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for multiple links, suggesting a phishing or spam campaign. No scripts were extracted, but the presence of external links is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wb?keyword=bissell%20steam%20cleaner%20for%20tile%20floors PDF link annotation
    • https://cdn.sqhk.co/nupasoxure/ghe8zqr/glass_ice_breaker_games_for_work.pdfIn PDF document text
    • https://site-1176453.mozfiles.com/files/1176453/lipategudaxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422135/normal_5fc7620e0226c.pdfIn PDF document text
    • https://site-1083679.mozfiles.com/files/1083679/zombie_food_clicker.pdfIn PDF document text
    • https://pazuvokase.weebly.com/uploads/1/3/4/6/134615635/dijefonosada_tulafulazonokib.pdfIn PDF document text
    • https://site-1171107.mozfiles.com/files/1171107/nazixexojexonobejamarox.pdfIn PDF document text
    • https://site-1178385.mozfiles.com/files/1178385/alien_shooter_cheats_iphone_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368250/normal_5fcebd92cc127.pdfIn PDF document text
    • http://komamoj.22web.org/allow_me_to_flex.pdfIn PDF document text
    • https://site-1195811.mozfiles.com/files/1195811/kme_service_metallpreise.pdfIn PDF document text
    • https://nimimetifav.weebly.com/uploads/1/3/2/8/132814674/marekimuruwaz.pdfIn PDF document text
    • https://nokifijipuf.weebly.com/uploads/1/3/4/3/134305843/f24b22.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xenemusexo.epizy.com/enalapril_davis_drug_guide.pdfIn PDF document text
    • http://tokukemojitiwil.epizy.com/pekowaj.pdfIn PDF document text
    • http://lilivuxaja.rf.gd/baxokajakobod.pdfIn PDF document text
    • http://gogolozumer.epizy.com/dental_anatomy_coloring_book_free.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_off0000cd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD55 5076 bytes
SHA-256: 9f1aa6f34056db131ea39d441d495209d7aba6bac8f2e1e4d8fb50b8359dba34
font_01_sfnt_off0000de83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE83 9532 bytes
SHA-256: 26f491ec9ecf743f2c14dc88256f4fb9b50e34fd3fc9123f567615ef4969520e

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