Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b7620cc2c0eeea…

MALICIOUS

PDF

836.4 KB Created: 2020-10-31 22:20:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e63ff27c1d93657260b6570ce3d09eb2 SHA-1: da79d222a93c052803f715b0196f409f136983e4 SHA-256: 27b7620cc2c0eeea13a15f87716d27d5375c6a8e0a84baa1700af56458413d05
94 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting it is an owner's manual, which is a common lure for phishing. The ML classifier also flagged the PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7876

Heuristics 3

  • 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.
  • 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://gettraff.ru/strik?keyword=infiniti+qx50+owners+manual In PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/c02036eab.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/jazoxulipube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379854/normal_5f8fbd660439e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_5f98f7709b35b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380699/normal_5f9123d7e906e.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/2327078.pdfIn PDF document text
    • https://zexivuwesime.weebly.com/uploads/1/3/4/3/134356920/8deedb8f7.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/fulesumuwevofuj.pdfIn PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/064c128cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3921/7602/files/pes_club_manager_money_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2687/7080/files/14971984601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4499/2666/files/13.1_rna_answers_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37db3686-96eb-46fc-9a0c-bcb70dcdb13c/furadipelenuliwupodifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8b3b90d-c241-4634-ba30-9803b141b592/jiwukuzasakekelimuzam.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000c9912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9912 4344 bytes
SHA-256: c6796ab5f5fa3eb3221a53d78537c4c82c65ad44b12c74ed1c1566bd6ee15c05
font_01_sfnt_off000ca82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA82D 5400 bytes
SHA-256: 9a1b4039f9bb168be72a906696677199085fe55a6715cbc80b811a9d77f01611
font_02_sfnt_off000cbaa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAA3 14628 bytes
SHA-256: efbf505fac2ee6e03a0a2eace6b740e769dfeb922314804feef776af59f5a9a1
font_03_sfnt_off000ce874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE874 16296 bytes
SHA-256: 5a7680c92ebca5c5121d64e63fc6be76ee11ebbd03a9851c038862a9fe7b9f85

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