Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cb1316a16d1a566…

MALICIOUS

PDF

40.7 KB Created: 2020-11-01 11:32:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f9a1ac9d66f4c71c16b1100807347d89 SHA-1: 1e43465db6ab55a069067cee7cb2541cf6043bf3 SHA-256: 2cb1316a16d1a5666cc1bad2d5dae90d6e98a13172110247dfe7ef70d17e8a2d
94 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, indicating an attempt to lure the user to a harmful site. The document body, though heavily obfuscated, contains the same URL. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/123?keyword=mililani+middle+school+menu In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f9377bb13a8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386094/normal_5f8cc4255485c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f874d8d353cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f8901b42b72b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380223/normal_5f91fef826d4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5f87fcebb62fe.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/1/0429/2893/0979/files/colmar_train_station_france.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/19789026176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2357/1360/files/fake_business_license_generator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9150/0449/files/waldorf_education_a_family_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/0243/7029/files/metabolismo_celular_catabolismo_y_anabolismo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/0286/0955/files/gikigiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9236/1887/files/descargar_rama_ii.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/99210817099.pdfIn PDF document text
    • http://��l��nky.orlandosentinel.com/2010-08-14/news/os-ninth-graders-stumble-081510-20100814_1_ninth-graders-middle-schools-classroom-performanceIn 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_off00006220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6220 5088 bytes
SHA-256: 944debae28dc9d26602ddb3b87b992ec24a7977398d7f621b0ee6e3c3010bfcf
font_01_sfnt_off00007353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7353 10564 bytes
SHA-256: 0bd5604a9c0cce4f864ceaf0a95f122eef0d17ad27424d5f062d532a539c4656

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