Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae5d0ca9584629e…

MALICIOUS

PDF

70.4 KB Created: 2021-03-25 07:11:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 53117caa6de2829fea0b862127b2d3b3 SHA-1: c4144a8eb3b6093a855c6e622fcee509617e99b2 SHA-256: dae5d0ca9584629e1402fc16a285db79e0c6a4819a73addccd73a192fff4c74a
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download' button lure further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/wix?keyword=mr+vineet+name+ringtone+download PDF link annotation
    • http://kolekewoni.mywebcommunity.org/black_s_law_dictionary_6th_edition_download.pdfIn PDF document text
    • http://pazolozul.mypressonline.com/regik.pdfIn PDF document text
    • http://zusiwibewire.mypressonline.com/21181597635.pdfIn PDF document text
    • http://vashobereg.com/bemoxamakisonef9pz9.pdfIn PDF document text
    • http://itdiscount.pro/95195923621e09fm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469633/normal_604e987f89c42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365586/normal_600460b7b43cd.pdfIn PDF document text
    • http://vemelaribox.getenjoyment.net/58321637828.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/general_data_protection_regulation_gdpr_2018.pdfIn PDF document text
    • http://dazavaluk.mygamesonline.org/calendario_f1_2020_sky.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/erosional_landforms_due_to_groundwater.pdfIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_831ccb7741b9470094ec9437328f72a6.pdf?index=trueIn PDF document text
    • http://dufojamimusim.atwebpages.com/wuxajelavo.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/where_can_i_donate_old_prom_dresses.pdfIn PDF document text
    • https://83372c7a-1065-4b07-8284-b64562b46e84.filesusr.com/ugd/035489_6f9e324eb5164d049577cee84f351180.pdf?index=trueIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_42fe77dd3fa24b24a6c02e5592358230.pdf?index=trueIn PDF document text
    • https://57fc24c6-ba7c-430a-bdae-05304608b610.filesusr.com/ugd/bc9c68_a1cc7b17bd88426ea43cc289d2d6fa76.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/zosufuxivaviwazegakun.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_off0000d3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A0 5124 bytes
SHA-256: 8c86f7047b988e69208d7853f5a7ec6e6c3b0cdc5b51a4713e17da28cb63014d
font_01_sfnt_off0000e517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE517 11152 bytes
SHA-256: f902622ec32be8d16a7a4bbbc67c05b311e656c02b73295610ab574375bcb005

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