Malicious PDF — malware analysis report

Static analysis result for SHA-256 e99e4be250455991…

MALICIOUS

PDF

68.3 KB Created: 2020-10-18 00:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: c5e69fde108c534c07360b4857105a77 SHA-1: e68fbedba2092d47ad6672b39a9db83f1467a999 SHA-256: e99e4be2504559913557ef7a366ee3690133e947d4138570b149d150e5623f10
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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
  • 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://ttraff.me/123?keyword=upgrade+adb+android+studio In PDF document text
    • https://lusukukupesakub.weebly.com/uploads/1/3/0/8/130815137/6ea94d94db3.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/73604bea-3df4-4d83-a29b-4a7c2f21934e/86634673220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10fea531-c4cd-497e-9def-623a77b9be12/37836323961.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aa31ab9-8d60-4197-8bb9-360062d60bf1/31190836272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b5b5efe-ee9a-4dee-8cd9-a229dc620903/69698068286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0ab53cc-4b27-4889-a169-5b261fdc8b74/21938761574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65a43485-78b9-469c-9a3e-88065021e6fc/susejuleladomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/nijobenuvuvelal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1345/6039/files/ralston_valley_baseball.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7797/4198/files/94575594569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8843/6118/files/rodibomumadekemefitebosef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9480/1568/files/metuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0591/4521/files/pine_creek_challenge_race_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f21f3c9-4032-46a5-a341-7288ed8cd40f/48781461742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c691e8-de63-4a9f-b2a7-b927b15fb236/budakatitizowusunev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe05a83-51af-4ea6-9f23-0c061fe2ab35/sitaduzevogidufowunozifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d531492a-6a33-4f30-93ea-ea69596ae6c4/20577315954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/533be969-36bb-460f-beb7-0f522bf00011/gemozijewibalikupotisikik.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD07 5224 bytes
SHA-256: 6f75491dd847855c78a0400190d3331de2446bb9fc4cb9b9d1335a63baef81cc
font_01_sfnt_off0000dece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECE 10828 bytes
SHA-256: f78957f080d22b4459d0c27daf3130da03edb07b681fb39927c7f7d28c355723

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