Malicious PDF — malware analysis report

Static analysis result for SHA-256 2825bc5d6bda07e9…

MALICIOUS

PDF

66.9 KB Created: 2021-02-22 11:51:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 472df0b73e380426656b431f8828aa2a SHA-1: eb7f9874c5e964afae3b901b8354839a347c2ce9 SHA-256: 2825bc5d6bda07e9ce4af9082bfcfca22bbd4932d29b0d0ae96b152525048638
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://leonvi.ru/wix?keyword=center+and+spread+of+data+worksheet+answers PDF link annotation
    • https://fowuwulavo.weebly.com/uploads/1/3/4/7/134754099/pusorekoxakorum.pdfIn PDF document text
    • https://kewenarizifosiz.weebly.com/uploads/1/3/6/0/136092989/xugowu_jasazokofi_loborekerusawo.pdfIn PDF document text
    • https://fitelibisubun.weebly.com/uploads/1/3/3/9/133987071/rigetukikadin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369317/normal_5fe316816446a.pdfIn PDF document text
    • https://purabadixubemik.weebly.com/uploads/1/3/5/3/135399060/xemagu.pdfIn PDF document text
    • https://cdn.sqhk.co/forexidof/ibghpAI/68355180101.pdfIn PDF document text
    • https://navojinalano.weebly.com/uploads/1/3/4/7/134755450/5f71c03e6e61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413835/normal_602c03d27cfda.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/uHhjigA/free_virus_scan_and_removal_for_android_phone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403565/normal_600f171e6afcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485822/normal_5fe0c232508ca.pdfIn PDF document text
    • https://jarurozo.weebly.com/uploads/1/3/5/3/135320013/ruzuwef_povos.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/ratixifo/57443145147.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/lulogabubotopogi.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/68183443072.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/accident_report_today_centurion.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_off0000c9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9AA 5160 bytes
SHA-256: d285f8929a5b36e32b1cd239315dc74ffae3c0032847c821d28ebf2cae73d4cc
font_01_sfnt_off0000db44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB44 10332 bytes
SHA-256: ae8ad0b4bc23fdef810a1ffd05068e7ede4bba4d6b5cf29f952fb60327c578de

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