Malicious PDF — malware analysis report

Static analysis result for SHA-256 7826f5399a2c774d…

MALICIOUS

PDF

81.7 KB Created: 2020-12-28 12:16:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-16
MD5: eb540aa19f7946ada81b4904da721234 SHA-1: a52c90ce3c00b33f21d700fdcca8adf57088f65e SHA-256: 7826f5399a2c774d77c73f7f6c1bc8ceae7034e04347def9ba3a9b1bf7063103
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • 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://trafftec.ru/wb?keyword=brick%20breaker%20star%20mod%20apk%20revdl PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368248/normal_5fdb79cf2ceed.pdfIn PDF document text
    • https://cdn.sqhk.co/sisalubitot/Ugjbidm/90685788983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377095/normal_5fd626f7d4c14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385231/normal_5f924a03a0f96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376358/normal_5f8d42e920cb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372361/normal_5f8f31397e719.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403806/normal_5fc9d4e13d35f.pdfIn PDF document text
    • https://bebibamo.weebly.com/uploads/1/3/1/4/131438385/kozufadalabikuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403143/normal_5f98967f48f63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_5f8a7d599472e.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/1a964d94-f0a9-4417-851c-6432c6ab758c/sketchup_for_woodworkers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a55b4fe-d9d8-4c67-9ed9-9e16d63bf701/50923209786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c49ceda5-e383-4814-832f-a63df0eea931/how_to_make_a_paracord_keychain_with_one_color.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE51 5532 bytes
SHA-256: 631c5f4123637fa31052ee78f88fac847e3b8c50115d861832868d7777ba67a7
font_01_sfnt_off0000f108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF108 2712 bytes
SHA-256: 3b0b5d0ddaf0329abc30653fc94e02e7ee3f36c93ff31054e08f8ed5f64bfdbf
font_02_sfnt_off0000fce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE7 11428 bytes
SHA-256: 3b152aa0be1ed17fbe2eba9f9fdc0341a3190489ab5cfdf71193ca96eacbdd00
font_03_sfnt_off00012430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12430 16196 bytes
SHA-256: d2f889d130c619f14f25655792e70ce5cc92e2856d314f3d1eecd14e3e6b33d1

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