Malicious PDF — malware analysis report

Static analysis result for SHA-256 3091d7ef5d637802…

MALICIOUS

PDF

43.7 KB Created: 2020-10-31 02:01:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: a179a568b88e64ad405c1caf228ae010 SHA-1: 28630ebbfb89eec8c2d248db78d273f66d46be83 SHA-256: 3091d7ef5d637802a1cf2f5f4dea82cb7d02cc8b2fad8a019df798e5fbf77d40
262 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 8

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=sabine+state+bank+online+banking In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380528/normal_5f9bd708aec83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405420/normal_5f9774e916a2d.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/5dcd58e5-7144-443d-a80b-2530d16e88ec/18626157370.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/52517328507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dd4d7db-b4b0-4a8b-aba8-d63b31298f50/2987490104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/021e20db-87f0-4a5d-bba3-f3d1868459d1/guaya_cosculluela_lyrics_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7568/0405/files/replication_transcription_and_translation_review_worksheet_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6303/3502/files/xomadaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0114e00f-b2b3-4558-94f7-01a829c64eb3/fajax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ccf90c2-ea77-4e04-af3a-e89e8e8d579d/gilurovapixubujenu.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/nagomufisabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/2968/1071/files/42134980162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3930/7949/files/57143733511.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/6378/4637/files/80042602042.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_off00006c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9E 5064 bytes
SHA-256: a02fc541a88d51924b9956b8cbd28b202bd756b09e1d6f868e43709ee0fa9406
font_01_sfnt_off00007def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEF 10456 bytes
SHA-256: 07873a5ec82aca9ddc11c9af7b41e9dbfad45c40e343d312472d6d5294d98add

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