Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee46955e13daca8a…

MALICIOUS

PDF

80.5 KB Created: 2021-03-15 13:37:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 19f194e311bd4cccdbf91895013c35b7 SHA-1: 14cec9c3d3332c58bb0759c104baf713389a9254 SHA-256: ee46955e13daca8a6580467bae9d6364cda05bee77e7b54c202ad71b5f57a708
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://druttle.ru/award?keyword=math+formula+of+mensuration+pdf PDF link annotation
    • http://cartest.pro/fajinebuwopejopodoxetonokf1mq7.pdfIn PDF document text
    • http://azorocheat5.xyz/61449596353gidbx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384480/normal_5fdc0260ecc6e.pdfIn PDF document text
    • http://boldly-grow.com/38088594529zsu7u.pdfIn PDF document text
    • http://ecoservice-vlad.ru/kipotevigomekih1fnx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414695/normal_603efc9aadae3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485704/normal_5fe0ebcdd4b7c.pdfIn PDF document text
    • http://kayikciakademi.com/vawefurahio47.pdfIn PDF document text
    • https://cdn.sqhk.co/fapebenu/i4Wxa5g/startup_ecosystem_ranking_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385417/normal_60061e5a2fb40.pdfIn PDF document text
    • https://cdn.sqhk.co/noligigibar/grifiaU/invisible_ios_text.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/gjigRnJ/52504804674.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://59b7e61f-9850-45ee-add2-e9646db267e4.filesusr.com/ugd/5b9365_11656669e741422598d20685cbe74ee2.pdf?index=trueIn PDF document text
    • https://22fea36a-5e19-4af1-b4aa-fe6e1efe0ee9.filesusr.com/ugd/b5a188_977b4c7b2af849199942bd57ed650f9b.pdf?index=trueIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_33aff33bae914331a815cfaece023bfa.pdf?index=trueIn PDF document text
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_d22471f1e2ff4d63991c85c8b393ee5b.pdf?index=trueIn PDF document text
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_1a2b972c576e48589cd7b97b0df8f35f.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46A 5284 bytes
SHA-256: 08de77e06cda31eab4ca978fa91e55eaa06cd70697688563e3fa6608156633b4
font_01_sfnt_off0000f644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF644 12084 bytes
SHA-256: 1dc983a7521e01c5292afe1f56ec3c9b000be620990c96dcc7c0c15ba288d886
font_02_sfnt_off00011fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD8 16152 bytes
SHA-256: 27dbea658a405d05c7bce15d0828c56848c17d661bcb89c8b15a4334cf5658cb

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