Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f81c4ba6d2d5064…

MALICIOUS

PDF

87.5 KB Created: 2021-03-16 08:26:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ae42af41d77a3696e1750fea2683a49b SHA-1: 85b484d70cfff112227e3578c444c0d02e2f11a8 SHA-256: 4f81c4ba6d2d5064adf7bd2e8879aec962ed718418d60500b501055e17839fa1
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to external websites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to "law and order svu soldier with ptsd", likely intended to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/wix?keyword=law+and+order+svu+soldier+with+ptsd PDF link annotation
    • https://cdn.sqhk.co/miburixegapu/dscMzia/kenakunaxumogovax.pdfIn PDF document text
    • http://suzupuwejal.mygamesonline.org/dijenuzasiralotizos.pdfIn PDF document text
    • http://demetoga.iblogger.org/nutijeguvikivoruvo.pdfIn PDF document text
    • http://vukabuv.22web.org/vukojeretiganifi.pdfIn PDF document text
    • https://cdn.sqhk.co/tiluzegata/fE68gcq/know_information_collocation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489740/normal_60318db273e68.pdfIn PDF document text
    • http://kepuxom.mypressonline.com/upsc_mains_sociology_optional_syllabus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476453/normal_60162970b2f2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://piretiwojof.epizy.com/edible_sheets_for_cakes_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cb6f941-00b8-4012-8330-572733f7f5b5/norton_shakespeare_3rd_edition.pdfIn PDF document text
    • http://pajamubo.rf.gd/nobunozufenapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2275eb64-da50-4004-b3ac-c0f55bfbdd79/fowomu.pdfIn PDF document text
    • http://tapanowi.epizy.com/o_p_c_ka_full_form.pdfIn PDF document text
    • http://gezixus.myartsonline.com/gefolupezidi.pdfIn PDF document text
    • http://gapisamiwabu.epizy.com/annual_return_form_11.pdfIn PDF document text
    • http://povodakav.myartsonline.com/risotulabamumon.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_off0000f1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BA 5140 bytes
SHA-256: 96d4134b3eb900fe3bb6e3ff8b30c82d72e899843f109e6d26bfe0b6603382b1
font_01_sfnt_off00010341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10341 4236 bytes
SHA-256: a6c6d53378da330912be0b2593624718bbe95569b510397c70e13acdfe5edef8
font_02_sfnt_off00010ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA3 12112 bytes
SHA-256: e9dfa97793f8df8e0e1cdb90d4a0a86e00051dfd8e65fdfd0259eb36340ce3e1
font_03_sfnt_off000137e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E1 17136 bytes
SHA-256: c6e072271c6be57cc0929366b7e4aa09cbe15f80a6cb8cb191302530321992f3

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