Malicious PDF — malware analysis report

Static analysis result for SHA-256 1421daea80af8b3f…

MALICIOUS

PDF

41.0 KB Created: 2020-08-18 21:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 434e242c7088482d74db8f33ae17998f SHA-1: 33f8a415923978d4bbb13fe9678825e66212607f SHA-256: 1421daea80af8b3f7cc244dc07266548776431067ab01932140c53aca9738331
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=barbarossa+spiced+rum+nutritional+information In PDF document text
    • http://files.deannaheathrealty.com/uploads/1/3/0/7/130739232/lejororetupom.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/1/0437/0549/9803/files/international_plumbing_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6372/8545/files/ccht_recertification_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5699/6247/files/rewedamab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7106/8577/files/windows_xp_service_pack_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8414/3010/files/60405758143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/31608267176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51686393220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4558/4033/files/array_of_color.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5993/7434/files/gufozifoxubuligejegami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4371/7274/files/advanced_java_programming_lab_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/nedanovebowolonijopati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6345/9496/files/15871653757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5040/1945/files/65001463804.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_off00005e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E42 5492 bytes
SHA-256: ca7f90e37598d540662816d2760dd913cdae50857ca2fe6b1401c04614fc5b3d
font_01_sfnt_off000070c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C8 11584 bytes
SHA-256: 5aaaadd7ecb28642a8a2dcbd5029638545eec92145d73e58019e3c8312b941b1

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