Malicious PDF — malware analysis report

Static analysis result for SHA-256 acbd3bca1a21623a…

MALICIOUS

PDF

71.6 KB Created: 2021-02-17 08:48:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7394f6a01d647bc35c5828601f288c65 SHA-1: 14f5d3367be007bfb5ee397059c669db1ba099ab SHA-256: acbd3bca1a21623a4510bf2c0474b8f23a4b061b6eb28e134c759d20a4e57cda
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/wix?keyword=does+swimming+actually+make+you+taller PDF link annotation
    • http://tujodugugejime.22web.org/kawopesipetenaxiwisot.pdfIn PDF document text
    • https://cdn.sqhk.co/jexozumumanu/jaDdgjh/80180688342.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391642/normal_602c5614a186e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459054/normal_600f917b5ee59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403143/normal_5ff635bde043c.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/lulelepese/billy_ocean_suddenly_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/wifomipuvufoludezezejepi.pdfIn PDF document text
    • http://daxevekiwenux.epizy.com/acrolein_test.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/airshou_apk_ios_9._3._5.pdfIn PDF document text
    • http://mudivakerimenog.epizy.com/benyamin_biang_kerok_reborn.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/kudafadup.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_off0000dd52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD52 5376 bytes
SHA-256: 427cceb17cdfd33821e0423124555e5082676592fc4350cc24b51a7d21c281dc
font_01_sfnt_off0000efa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA5 9916 bytes
SHA-256: c18e3d6ff5eeb7e4bf2af311d33ff230b7e0dfb29c76b699ffc98ec84581e7d8