Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a618588fa61ad44…

MALICIOUS

PDF

160.0 KB Created: 2020-11-18 12:52:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0235ea1201cf14cb8a2a4815d22370bd SHA-1: df12a29039964d214fc60802612e754de9b63d15 SHA-256: 0a618588fa61ad44199d49a9c6d6f81a5396cc34aeee8ba223e93eafd10212a2
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://cctraff.ru/aws?utm_term=aaalac+annual+report+submission In PDF document text
    • https://leninopuzidami.weebly.com/uploads/1/3/4/4/134493411/sizinufu-juzanigebakafo-fuwuku.pdfIn PDF document text
    • https://goneludolazoga.weebly.com/uploads/1/3/4/4/134488647/1819914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f96a1f629530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5f94dd22db894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426422/normal_5fa6a643819b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476127/normal_5fafb8a98f335.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_5fa1a9ef2d8ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457561/normal_5fb4c78a39456.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/4516825.pdfIn PDF document text
    • https://wekegakusujesal.weebly.com/uploads/1/3/4/2/134266445/gorudevemafos-nalajukuzu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445754/normal_5fa225b8a7f03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_5faf65fcd0162.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_5f8b67505a07d.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/rexogeguxosix/wazagisetuzo.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
    • 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_off0002240d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2240D 5208 bytes
SHA-256: 2c38595a18cbde5059095bac3dc368ff1308fd01c0cb663a18ccd1cb420843a1
font_01_sfnt_off000235a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x235A5 11708 bytes
SHA-256: 3e59c52b7a9e2601ee1ad1c1d7a0f6e59c59172b8b19fec6a728b49cf7db0296
font_02_sfnt_off00025d11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25D11 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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