Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0a066d1665be2e…

MALICIOUS

PDF

91.6 KB Created: 2021-04-02 04:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 58011b123ef27d61f3d28e894a2cdbae SHA-1: 50ecb8910625ee9c282f3fce27c5dd86b414ef8f SHA-256: ae0a066d1665be2efd75bf821ce364b24a4b2920e0e2583936f34b25d46e16f3
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://maypoin.ru/award?keyword=capitalismo+socialismo+democracia+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385634/normal_600081d1c433b.pdfIn PDF document text
    • http://freud.icu/sagujipapilutawoburirub72xqo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496580/normal_60217aab5e472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470028/normal_603acc4b192d6.pdfIn PDF document text
    • http://cosmicgig.com/25656647681bubu5.pdfIn PDF document text
    • http://bodaweziwov.mypressonline.com/57211816738.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394071/normal_5fe27ceb1ac41.pdfIn PDF document text
    • http://masajsalonunuz.com/varewewefasu1sz3x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470826/normal_602e788eb31c2.pdfIn PDF document text
    • http://sokfresh.fun/tivukagijakapi5gkzf.pdfIn PDF document text
    • http://lejazubi.iblogger.org/second_law_of_thermodynamics_chemistry.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wiwilevo.epizy.com/76306088170.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/buffer_systems_in_the_body.pdfIn PDF document text
    • https://5e20aa6b-77ef-4f11-9344-5454fb7c649c.filesusr.com/ugd/fb3aa9_01f2f85dde2541f7b8c7062b0084762e.pdf?index=trueIn PDF document text
    • https://fc59733d-949e-4df9-817b-fea2515c5cc7.filesusr.com/ugd/689329_8d275d3c7917483498557e4ebf076649.pdf?index=trueIn PDF document text
    • https://7b4e975e-109f-4397-a679-93e438ff1453.filesusr.com/ugd/c33f71_61bae8915a514c03b00825eea1c70e59.pdf?index=trueIn PDF document text
    • https://61249681-e2d1-4375-841a-b3723294d79c.filesusr.com/ugd/3d514e_f9019a7e62284ca691adf44635ef7d66.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a985a80-81ac-4f53-aabd-df62cfe0be8e/59572420504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c33a8527-e6af-4426-9377-885bda0025ec/59196916090.pdfIn PDF document text
    • http://wowutuzineko.myartsonline.com/nios_psychology_book_download.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_off000122ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AD 5208 bytes
SHA-256: 1650d6328fb67a98bec8c309ff166cbba4886d018b452af67f3793fa5d5ab409
font_01_sfnt_off00013446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13446 14036 bytes
SHA-256: fdaa5b3efbc4d5915c1abf3e748640242820284931251d93f3f77e839d55da93

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