Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed12cbcbdbcd28c…

MALICIOUS

PDF

50.4 KB Created: 2020-08-24 23:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8dff97a43760d74c553e7ca8f878c513 SHA-1: 307ae18dc5f3e2701d3deb2324f31cb5f646bfa4 SHA-256: 0ed12cbcbdbcd28c08c0be4a7d542bf7c2c5937097ce200a3491f225ec301768
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://ttraff.com/pify?keyword=school+complaints+letter+template In PDF document text
    • http://files.newcreationeq.com/uploads/1/3/1/4/131413718/241bf4c594ec3.pdfIn PDF document text
    • http://files.rominaberenicecanet.com/uploads/1/3/0/8/130874241/916995.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2690/6264/files/17234832992.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/how_is_a_maze_procedure_performed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5176/0281/files/hemorrhoids_guidelines_treatment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9013/1609/files/90007257103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6844/1254/files/klondike_solitaire_games_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7925/1608/files/baazaar_movie_khatrimaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/30155581481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6232/1567/files/vubosuwomezovenokimini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/icloud_icon_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5720/9753/files/4332780736.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_off000086a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A7 5276 bytes
SHA-256: fa366501a005fd14381c4720b46a880d20533b0d067e884a6b6df9db6e660ce7
font_01_sfnt_off00009866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9866 10648 bytes
SHA-256: 5dca61a8dec43770433dd47d7560c487340f2467eae45d0f727bece8fd5ab267