Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8624052d8031fb4…

MALICIOUS

PDF

48.3 KB Created: 2020-10-22 10:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 7278b822309e91b0b39cda19904ec43c SHA-1: f4f2ee0e4ecea259c92dab36112a4081a47f109f SHA-256: f8624052d8031fb44dbaaa78dda026bed598074075ea49d569ada34511d5f6ea
142 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://gettraff.ru/123?keyword=whatsapp+mod+iphone+para+android In PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/b811e682.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/beparinunij.pdfIn PDF document text
    • https://zozilevijuni.weebly.com/uploads/1/3/1/3/131383476/8608534.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/a02dc248e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375350/normal_5f8b9e256dc3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_5f8af3353a1de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379718/normal_5f8ee48c8ca95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368788/normal_5f8961192239d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f8b5cffd6f9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_5f8bcc733a30f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_5f8853b3bc77d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/pacman_download_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3526/1085/files/port_clinton_lake_erie_fishing_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4179/0871/files/the_boy_who_ate_the_moon_jane_martin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7612/7394/files/gravity_guy_apk_full_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ea21d7-ecbc-48c3-b1b8-97ff4e414573/78807829100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5753c241-a474-4d8c-81cd-bcaf918047be/ley_de_amparo_comentada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e08627f-51a0-4198-a9a3-db3f7aa445f5/58444552991.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C39 4968 bytes
SHA-256: d8df77f29301127cce3dab3fea49061a15347a1a175caf78be8440dd69f6465b
font_01_sfnt_off00007cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF5 12664 bytes
SHA-256: 073387bda9715b3e8e6b185a31ae5bbb3e28387f1b55c79740b28de054ca6318
font_02_sfnt_off0000a60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA60C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2