Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bbb1dae8a668136…

MALICIOUS

PDF

67.0 KB Created: 2021-02-22 23:47:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: df3c1f867fa0cf0bb072792479d3b860 SHA-1: 4bc7deda02c4bb10d03d844926b50028a45678e8 SHA-256: 4bbb1dae8a668136497fb3119a462c280f66940eb7042a44f7eaf1dc362479dd
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

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://maypoin.ru/wb?keyword=fiasco%20game%20review%20dice%20tower PDF link annotation
    • https://cdn.sqhk.co/mikevoponage/53v8cwF/95311965803.pdfIn PDF document text
    • https://cdn.sqhk.co/patizuruf/lgeggvh/wiribivowuguvo.pdfIn PDF document text
    • https://xavedogaw.weebly.com/uploads/1/3/4/6/134659805/faverekigajar_senisutodet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479678/normal_602f2396eb38b.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/fjcdgjp/titan_quest_ragnarok_best_mage_build.pdfIn PDF document text
    • https://wosumugip.weebly.com/uploads/1/3/4/8/134867897/ruvogakudaf.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/gjYAkKN/wiladuse.pdfIn PDF document text
    • https://fopabitibomasad.weebly.com/uploads/1/3/1/8/131857723/mevuwajubenujab.pdfIn PDF document text
    • https://jizufolikoni.weebly.com/uploads/1/3/4/3/134349493/9247448.pdfIn PDF document text
    • https://dojilosadokadog.weebly.com/uploads/1/3/4/8/134890500/fagevifo-nekozunoxavewo-xupumuduzowuf-wogusifosod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454054/normal_602e3f99ec33f.pdfIn PDF document text
    • https://danivuzi.weebly.com/uploads/1/3/2/6/132681213/tuvukepemabugo.pdfIn PDF document text
    • https://nopetozu.weebly.com/uploads/1/3/4/5/134507327/rijukuda-pifopalufuzo-wikebijegi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zutagokakaki.rf.gd/todutekap.pdfIn PDF document text
    • http://palalujopaxuv.epizy.com/66390294852.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/editable_table_seating_chart_template.pdfIn PDF document text
    • http://rujunigowe.epizy.com/vatopuv.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/tevekimebepegi.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/india_map_drawing.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_off0000c977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC977 5332 bytes
SHA-256: 494e405fb3aef184f99d0347a50ff0c3fced7f9d584d1b21b865d79efffc7379
font_01_sfnt_off0000db96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB96 10308 bytes
SHA-256: c219f7dd37bd0879da851e7e54c3918be4b348682b05a5ec5265b4d8b0020f64

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