Malicious PDF — malware analysis report

Static analysis result for SHA-256 a800b18048e15cf5…

MALICIOUS

PDF

70.5 KB Created: 2021-01-25 07:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 3b8fa6eb407084176e0de18f968fa13a SHA-1: c50c0d66b98e5887e83e8ee3d846dcd1b988625e SHA-256: a800b18048e15cf5c69dc9e497b73113da1fd6826706773ef94e829deae0a8fa
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/123?utm_term=prayer+request+forms+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426944/normal_5fd8edc1494af.pdfIn PDF document text
    • http://reduslim-buy.site/flying_swords_of_dragon_gate_reviewrw8sj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473919/normal_5ffb6b53c303c.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvomuvugu/jibgeja/werumegififej.pdfIn PDF document text
    • http://cosmeteca.com/best_romantic_caller_tune_in_tamilqpy2t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424029/normal_5fe9f347b8b66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404488/normal_5fe91c73948cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366665/normal_5fccbfa2b607c.pdfIn PDF document text
    • https://cdn.sqhk.co/walumupo/UZxzrUw/94374535710.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/2qiajdC/nukirifutowudevifif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471690/normal_5fda6b9d5c843.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/xijilesuzuxo/zetemupisojofeximimo.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/98002365838.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/latatuzaj.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/cheerleader_uniform_catalogs.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_off0000d7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A3 5384 bytes
SHA-256: c7f11c73f08ba00fb36e610583822ba3aa64e6e5f1de21a848cac61a10fb6c90
font_01_sfnt_off0000e9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E7 10476 bytes
SHA-256: 0425fc3abd2b9c436511c576ce2c46bac0e26d0c69152fcda5474f7cce92ce28