Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69bdce2a0967138…

MALICIOUS

PDF

43.6 KB Created: 2020-10-01 22:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4c935b21bc8dbd9b98b0577b7d7d279a SHA-1: d0b583877f3ac0dcfe4774eb3df308cb85ed6140 SHA-256: c69bdce2a0967138741bdbd1c7eab4e89fd48962d674c26770614af0d785d44a
234 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=from+the+neighborhood+2+the+stage+do In PDF document text
    • https://site-1037827.mozfiles.com/files/1037827/xalubexuz.pdfIn PDF document text
    • https://site-1036929.mozfiles.com/files/1036929/11947610436.pdfIn PDF document text
    • https://site-1039449.mozfiles.com/files/1039449/zimum.pdfIn PDF document text
    • http://files.bosfchounds.com/uploads/1/3/1/0/131070437/4896703.pdfIn PDF document text
    • http://files.arme-international.com/uploads/1/3/0/7/130739651/fe65f3.pdfIn PDF document text
    • http://xoruxaj.newtekjournalismukworld.com/uploads/1/3/0/8/130814132/vedomifuwam.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/a493db8d-fb2e-473c-968a-764f833e35cb/66261715937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e5bb117-910f-4986-8c90-dc9091e2c7e9/61904057464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89901c1c-82ad-40f3-afd3-8304462f86f4/79500444644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d94703eb-b34d-42d5-994b-d04cc598678b/53007855618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8878/2236/files/the_son_of_god_download_by_nathaniel_bassey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2882/3719/files/tojeralefogidofumegobote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/4891/9191/files/tyler_13_reasons_why_height.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3396/3943/files/jikibibofirumisalaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/gobejas.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_off00006970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6970 5432 bytes
SHA-256: d73463b2b04e2df811ce13062505c4ce6990a823040d49586891c71a5b5c7a2a
font_01_sfnt_off00007bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBD 11016 bytes
SHA-256: 57b079841ad00f2983e685bfc1be9ad95208844dab733274f0256648d0e05456

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