Malicious PDF — malware analysis report

Static analysis result for SHA-256 78aaab472c838167…

MALICIOUS

PDF

109.0 KB Created: 2021-03-08 13:00:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 093f33cb048d312ddc91b8dd39ff29e9 SHA-1: f2ff80c56fa7fe2c617981a35c06c97386319eec SHA-256: 78aaab472c83816712ce0be8acf84e7d4f13d89b4468198bdcdf4d7ec0d36394
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/strik?utm_term=columbus+blue+jackets+new+logo PDF link annotation
    • http://tonimaxuta.iblogger.org/77870920232.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374021/normal_5fe43ea591d48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476011/normal_5ffba4ea8e40e.pdfIn PDF document text
    • http://manekobe.22web.org/book_ka_full_form_kya_hoga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378161/normal_603e9c6ee96b9.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/kitakilesa/bottle_flip_3d_cheat.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/zombie_catchers_apk_hack_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/nobovumese.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/82863121624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6b101c7-625d-405a-a0fa-89b1dd28e95f/rexazoto.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/camh_foundation_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/nupexolonino.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/15659078642.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/vsco_x_new_version_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/gixuzurikonifivizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c78cb56-da7d-416e-a451-b6235f8a9d0f/likokefexanujanesolo.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/govexokejebemivu.pdfIn PDF document text
    • http://ledolabufimo.epizy.com/nixifodi.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_off00016ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BA7 5300 bytes
SHA-256: 7eef8b7eb7bd9d9f9cc062b35ffa827f47af6afd1f4691aab937ed98fb378d5d
font_01_sfnt_off00017db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DB0 13024 bytes
SHA-256: dc45c2c2a32b753512461e7e6a830cc9c578ea01ebcd1db02b0bd700e0b13575