Malicious PDF — malware analysis report

Static analysis result for SHA-256 19cb9d6014f805ac…

MALICIOUS

PDF

50.0 KB Created: 2020-10-29 06:32:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4e1c31349495e651deb1d0b3a0352bdd SHA-1: 213f69e038961bc380217ac2271e95952ef032f0 SHA-256: 19cb9d6014f805acc8327e2b578042a414a44c670bc2d1d47a21b87bc7c096e7
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a game hack, which is a common lure for credential phishing. The ML classifier strongly flagged this PDF as malicious, and the presence of a link to a known malicious redirector further supports this assessment. The document body, though heavily obfuscated, contains the malicious URL, indicating an attempt to trick users into visiting a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://fupefasupemeze.weebly.com/uploads/1/3/4/3/134315788/gezufafivu.pdf.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ggtraff.ru/123?keyword=8+ball+pool+free+coins+hack In PDF document text
    • https://fupefasupemeze.weebly.com/uploads/1/3/4/3/134315788/gezufafivu.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/1a27643b41869.pdfIn PDF document text
    • https://boxavukexuzar.weebly.com/uploads/1/3/0/7/130775797/1234380.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370053/normal_5f8a449abe8d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379030/normal_5f8f89ee41691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409604/normal_5f9a2c5cbcadb.pdfIn PDF document text
    • https://xemivigezeb.weebly.com/uploads/1/3/4/4/134481563/1504239.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418191/normal_5f96453b9bd08.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/sakaburepagase/39866930490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3708d550-372c-479f-be0d-864ead26228f/22709975737.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/microsoft_sql_server_management_studio_2008_r2_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/nedufukajapelajexipi.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/how_to_use_japanese_abacus.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/molecular_orbital_diagram_for_allyl_anion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e44fce66-0509-4bab-b373-56d75359f1fb/manuel_jess_falconi_magaa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf69f5f8-cb3f-411c-bc2c-9e49004e3e39/ps4_controller_sensitivity.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/success_additional_mathematics.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73CA 5408 bytes
SHA-256: 5bb9f9800cced7ccabc5217beb833ac85581898f296257b5283941799d3d25d9
font_01_sfnt_off0000861b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x861B 2344 bytes
SHA-256: a570584de28f10526b2cece510e0da507e507fa731cd9d6bfa4ff98cbcef12d1
font_02_sfnt_off00009060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9060 12504 bytes
SHA-256: 703a73d7a6562fb2b32c1c173e137e62bf2199a686c56e31b22c632611b17ae7

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