Malicious PDF — malware analysis report

Static analysis result for SHA-256 de40836b7838e59d…

MALICIOUS

PDF

79.0 KB Created: 2021-06-05 12:40:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9ca152fd90701797ae0f047b5a4cf7e2 SHA-1: 555851c3258994ee5bb8dc0bc6de6d85238fcbb4 SHA-256: de40836b7838e59dd8295eb963f40a2eb0452b1917b4a163a76d53fbd1d141ae
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The embedded URLs, such as 'https://allytemp.ru/pbw?utm_term=ocean+mod+minecraft', indicate a lure to external content, likely malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://allytemp.ru/pbw?utm_term=ocean+mod+minecraft PDF link annotation
    • https://dedidebu.weebly.com/uploads/1/3/2/7/132740692/2519079.pdfIn PDF document text
    • https://vuvopovakufusoz.weebly.com/uploads/1/3/4/3/134342968/nabuzowa-luremes-rugofin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_60b8f8eb330f2.pdfIn PDF document text
    • https://babibuxa.weebly.com/uploads/1/3/5/3/135302477/4789976.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424672/normal_5fef9a8126d66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445341/normal_60463ce287521.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375200/normal_602dc5ecad582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469378/normal_602fddb2b437a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500667/normal_60141135280d1.pdfIn PDF document text
    • https://rotowuvusokij.weebly.com/uploads/1/3/4/8/134884207/bexikanukap-zubewukuxizol-kubezadopori-gozeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367004/normal_5fe0b3f434e8a.pdfIn PDF document text
    • https://lubikumak.weebly.com/uploads/1/3/1/4/131453733/pilowi_ramixixiruned.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452845/normal_6029aef84db11.pdfIn PDF document text
    • https://wozexapumodokeb.weebly.com/uploads/1/3/0/7/130738903/sodidabosat_womavubil_wizejiselozu.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4475582/normal_60b599c56802d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a497e34-2fb8-4f53-96e5-4a5bee1b6454/77754199374.pdfIn PDF document text
    • http://munonoraze.pbworks.com/w/file/fetch/144618363/rebel_racing_mod_apk_download_unlimited_everything_2021.pdfIn PDF document text
    • http://xelivolofuso.pbworks.com/f/levujonekexetewira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f38b5ffe-8110-4f0f-8160-102f696697c0/mysql_tutorial_for_beginners_with_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3b15be8-551e-4fc6-848e-dcf539598ad5/vusape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4bc97a-783f-448f-9dbf-b85e015888a9/30750378513.pdfIn PDF document text
    • http://zezimin.pbworks.com/f/63382737998.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_off0000f80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80C 4984 bytes
SHA-256: 670e6b3a0850e913632404b5ea00a59e7598f127530d4f754a1ce71713ce5820
font_01_sfnt_off000108e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E9 11176 bytes
SHA-256: 8fcc24f5a50822cf1aca7c165f09f24ba2492b45de4c30f6423261d65d338de8

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