Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f0c812569ff6bf…

MALICIOUS

PDF

38.6 KB Created: 2020-08-26 13:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a43352c1ce9f921e5ebab92eb72792db SHA-1: be4a69d1062db2b0134186050d26962d35c1b679 SHA-256: 10f0c812569ff6bf19f7a819f67d85ae9df83965d0869ba525f7480e18e8fb15
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.club/pify?keyword=printable+blank+comic+strips+template In PDF document text
    • http://files.eslmyway.com/uploads/1/3/2/8/132814427/320354.pdfIn PDF document text
    • http://files.oilfieldfrclothing.com/uploads/1/3/1/4/131412558/2830019.pdfIn PDF document text
    • http://satagug.ashleyscleaningservice.org/uploads/1/3/1/3/131379394/35ae3384.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/1/0429/6769/5509/files/57344676004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8030/9141/files/block_video_ads_chrome_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1737/9750/files/bncc_educao_infantil_baixar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3041/2454/files/45672381620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1321/6168/files/31740807573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7652/5984/files/66349168226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/aida_opera_synopsis.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_off0000594c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x594C 5284 bytes
SHA-256: 9ede258c6ef61c23ea83c907a49b9da041395693c326c32fe406bb17c20bb9f0
font_01_sfnt_off00006b1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1E 10172 bytes
SHA-256: 99e2653c5e260ef29c45d732dd04e48f970e121bce5eda0ca41c15ed82fab3d0