Malicious PDF — malware analysis report

Static analysis result for SHA-256 d89dd8c6184e1f5e…

MALICIOUS

PDF

43.7 KB Created: 2020-10-01 23:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 39cbb7b71df5f8676bea121bf317b1cf SHA-1: 5897142f9d0ff684b6bf6b9dc3d94af74bfd0fff SHA-256: d89dd8c6184e1f5e8db090a1542f92a5376eb003f2a4f9bc8b45e11f217b4170
194 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.
  • 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.
  • 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://cctraff.ru/strik?keyword=a+thousand+years+lyrics+pdf In PDF document text
    • http://badejat.gilipalms.com/uploads/1/3/0/7/130776255/8a17aa4945.pdfIn PDF document text
    • http://files.millshillbaptistchurch.org/uploads/1/3/0/7/130739991/f388ee2fc70420.pdfIn PDF document text
    • http://files.innerdolphinawakening.com/uploads/1/3/1/6/131606035/kumuvefajolen.pdfIn PDF document text
    • http://files.coffsphysieanddance.com/uploads/1/3/1/6/131606006/5cda80e14c44e3e.pdfIn PDF document text
    • http://vubetaf.oszkayconstructioninc.com/uploads/1/3/1/0/131071256/bijonesobefodiwegevo.pdfIn PDF document text
    • https://site-1039343.mozfiles.com/files/1039343/jezene.pdfIn PDF document text
    • https://site-1039757.mozfiles.com/files/1039757/xelugekunafutimobox.pdfIn PDF document text
    • https://site-1036639.mozfiles.com/files/1036639/xujudazubejijuzipopupi.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/496e5e70-f1af-4377-9a3c-a838d52ac25d/fobaxizosomufurozumadun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc1e6646-1c7a-427e-a87c-7355c6607253/98273895661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/562c4674-75a2-4943-8b53-e0efe97e38fc/71783510564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2460/5599/files/68696486154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4488/5912/files/53901558803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9394/0641/files/zasapajimodadudirixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4542/8120/files/penelope_garcia_criminal_minds_weight_loss.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_off000068fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68FE 5336 bytes
SHA-256: 5888261e56417c5379c09bd573a3a5b08481b73a5acfc63359af934082dc9568
font_01_sfnt_off00007b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B29 11740 bytes
SHA-256: 6daf134554b7a692798b4c63b0bb7edee28f520a4042b6007030005431be6d8f

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