Malicious PDF — malware analysis report

Static analysis result for SHA-256 92351702ee856414…

MALICIOUS

PDF

60.3 KB Created: 2020-11-28 16:54:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b83dac6826f88a59dbaf991d1d668bc4 SHA-1: d3151149968123b748faf55a3c7cca58643feabc SHA-256: 92351702ee8564140ce39f1b81710a0e5e594f34b23674e720d4e467c190d7ae
156 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/strik?utm_term=navy+mentor+program PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418180/normal_5f9a3473b3bd9.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/defesug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427103/normal_5fbc578f23eb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418391/normal_5fc13a2d67dd1.pdfIn PDF document text
    • https://xujupowosorome.weebly.com/uploads/1/3/4/4/134485259/novam_xuxevozow_zedekelugigos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375083/normal_5f9f03ee47428.pdfIn PDF document text
    • https://lovunekigip.weebly.com/uploads/1/3/4/6/134685916/ladogorefod_vizilipixelipid_diriranefikoril_tupevaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5fa044792236e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d38a7d2-26ee-4a51-a92b-577bd5c03052/cry_for_you_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4223f7fd-40a0-444b-a7cc-2facb3461f55/reading_rainbow_song_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba32da0-6f32-4519-a5c3-d1b33bdc1ddd/jw.org_bethel_application.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89804708-9e9a-4aee-bc0c-2368d0175162/18263230024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb5f1224-0f15-4c2e-8264-037f5d8f7f6c/xikunafawipir.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C4 5060 bytes
SHA-256: f1a286ea15eb8f99877724b6a92561fee6c24b6b4abc7bcd4b6c73b8abb30af0
font_01_sfnt_off0000c3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FD 9560 bytes
SHA-256: 42c505fdf11bbfe653cbc9a2b72a5e906e0c1bbd35984144bc262df4cf882457

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