Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e1c8f700cc3e880…

MALICIOUS

PDF

73.2 KB Created: 2021-03-14 15:19:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 24e842eb8b7bd6ef201d0c8974d19012 SHA-1: e99df78a9b7b1285f614d28c182e2c9d825c974e SHA-256: 6e1c8f700cc3e8808834aa3adc353d5511c53cd8e8cdcf50ffca408addafc5ee
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jumiwimov.ru/strik?utm_term=what+is+a+royal+standard PDF link annotation
    • http://lozhobelir.space/2012_yfz_450_repair_manualabqa6.pdfIn PDF document text
    • https://cdn.sqhk.co/muresogus/Hgcgdge/88291163417.pdfIn PDF document text
    • http://aov.one/gimowarixelatokojegt636.pdfIn PDF document text
    • http://azakalaza3.xyz/canonical_transformation5ivcj.pdfIn PDF document text
    • https://cdn.sqhk.co/gapobuzijiru/eRvMgc6/kunixibedux.pdfIn PDF document text
    • http://rukozhop-guide.com/70292066675ef5qt.pdfIn PDF document text
    • http://mugurapit.sportsontheweb.net/s_chand_biology_class_9_download.pdfIn PDF document text
    • http://mynasert.online/velolugidirili6wov1.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/what_were_the_terms_of_the_treaty_of_fort_laramie_1868.pdfIn PDF document text
    • http://kevifiregerufug.scienceontheweb.net/51385929191.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_b92be41a8bfa4732b21ea16c49680688.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/87fa87f0-d075-4232-b152-b6fef15b4f10/gas_dynamics_john_and_keith_3rd_edition.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/wooden_dollhouse_walmart_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e31217b-4b60-4ce3-9020-0080b38eb420/origen_de_un_proceso_de_investigacin_cuantitativa_cualitativa_y_mixta.pdfIn PDF document text
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_fa4e73cd1a314271a891267d9a519017.pdf?index=trueIn PDF document text
    • http://zipemoluligera.myartsonline.com/72747862346.pdfIn PDF document text
    • https://3c3b6f52-20a2-448a-be11-eec5930c502f.filesusr.com/ugd/0ca786_d821ab0cb8524666ba14178cdd92e57c.pdf?index=trueIn PDF document text
    • https://ddd59a73-be73-4575-bd7b-2e5900175f8b.filesusr.com/ugd/5dc0ef_6ded87e8ad6d454aa91af6b87483c833.pdf?index=trueIn PDF document text
    • http://jezevenakos.myartsonline.com/83903748579.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_off0000e1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A8 5028 bytes
SHA-256: 3204df21fdeb31ca35a6fe421bfe9ae8d88790e8121d57f009f9339437da9037
font_01_sfnt_off0000f2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C6 10988 bytes
SHA-256: 83cb1e65299b67b247257d7a628573df4f40b278248b3037c5ac870729141842

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