Malicious PDF — malware analysis report

Static analysis result for SHA-256 39966369dc7a757a…

MALICIOUS

PDF

149.2 KB Created: 2020-10-28 13:23:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 856a8178cf6a7dc90e52c354d29ebcf2 SHA-1: d8c541e0cc08b5efd98a80dc6846a3e70afff6c1 SHA-256: 39966369dc7a757ad9e21aed383f073fc33eb8ebf50e52b630a8635bad97e76c
102 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains keywords related to 'Oregon board of pharmacy hydroxychloroquine' and the URL itself, suggesting a targeted lure. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ttraff.me/123?keyword=oregon+board+of+pharmacy+hydroxychloroquine In PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/katekalabu-zexebokonoraw-kuvapokagirixob.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/0c36a492.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/kivirumu_dadoxizure_tanoxobumamo_xilevajed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f9397b1da65f.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/ffecf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369324/normal_5f88984b7b1b9.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/xisub-jiferap-vajawugaz.pdfIn PDF document text
    • https://janokapaw.weebly.com/uploads/1/3/4/3/134329878/lalufare.pdfIn PDF document text
    • https://kifelulamexeb.weebly.com/uploads/1/3/4/3/134310841/wufanuza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375353/normal_5f8dfd2b8e8ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414486/normal_5f98a7e724d05.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/c119c3e2c1f5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374859/normal_5f98c53a9b06a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368732/normal_5f9324848e3e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_5f932a45cce0d.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/fujadabez/malta_cerveza.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/kodiwogigogefobo.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/lisubovijud.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/standard_phonetic_alphabet.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/jipaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/volokosuzajilogetemuf.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/barreras_fisiologicas_de_la_comunicacion.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/16723474412.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20836 5856 bytes
SHA-256: 8f0790285c08e51d7cdb38009aafdd58bafa8ba8ac6d7617304fef01d806faee
font_01_sfnt_off00021bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21BFD 12008 bytes
SHA-256: 91506a450646f90666b4cd3782b3504bfc82005a323307f99d46a24622bb9fcf

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