Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca0f93c2bdfccf3c…

MALICIOUS

PDF

80.4 KB Created: 2021-03-20 15:34:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2d83a409d7e98152e370b60e2e974266 SHA-1: 1a7f782f1d373a7b1b80e067a97cbc9a3806f48e SHA-256: ca0f93c2bdfccf3ca8ad7311a085e61ef76228fde96f1ca34b237c5313f54594
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 0.9996

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://golowaki.ru/award?keyword=architecture+interior+design+books+pdf PDF link annotation
    • https://fexixulakuruzas.weebly.com/uploads/1/3/4/7/134723370/teraginiji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388613/normal_6005a34bc993b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459062/normal_60531b850e4bb.pdfIn PDF document text
    • http://websporizle4.com/dante_s_inferno_pc_kickassnzbc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478408/normal_6008121a55c3e.pdfIn PDF document text
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/kororu.pdfIn PDF document text
    • http://kismyketio.com/27201735084wksxq.pdfIn PDF document text
    • http://rubisteq.online/atlas_lathe_manuall3ogv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476015/normal_5fce23a42ff21.pdfIn PDF document text
    • http://marketes.pro/6431797685wvblg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373520/normal_6019a01109dca.pdfIn PDF document text
    • http://7lessons.site/aplicaciones_para_editar_fotos_gratis_para_celulart1ngd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jinimivunom.epizy.com/what_is_noun_and_types_of_noun.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/rogozak.pdfIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_28d3bad5cb3342f0b9d31313dee904f6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gosete/46585871169.pdfIn PDF document text
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_239254c0e994449ab92e15363b741700.pdf?index=trueIn PDF document text
    • https://2a085669-a8dc-40eb-b1d3-71ea9d660f60.filesusr.com/ugd/cafc24_a87d58c4a10d4cb28506678cab9adced.pdf?index=trueIn PDF document text
    • https://31f314b5-0768-4c24-bd49-4596ea953b46.filesusr.com/ugd/85a4b1_2e739740c7494dc084491187a840c623.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/watch_romeo_and_juliet_1996_online_free_hd.pdfIn PDF document text
    • http://dajajubofu.rf.gd/boremisozefabawaferaxex.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/finanzas_personales_sud.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_off0000f9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DF 5368 bytes
SHA-256: 838500e7c11a20ce7e396a7bfb3d86761cf6bd07d43b21e6994a2781c73148c4
font_01_sfnt_off00010c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1E 11048 bytes
SHA-256: 513c761b2d2550d39ef0a16e013dc779c06eea4883daeee042d68f3ad6812a99

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