Malicious PDF — malware analysis report

Static analysis result for SHA-256 0589881b8313943f…

MALICIOUS

PDF

40.6 KB Created: 2020-10-17 17:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ea71667f4236a2f4bd53c3cffae929b7 SHA-1: b64f88994ebe1eb7983626fd024eee10a8edcb94 SHA-256: 0589881b8313943f3c78922a1b366ddf6eec93788a8d36e1fe22ba93fa2184f1
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.me/123?keyword=point+slope+form+practice+worksheet In PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/3868b021d7a585d.pdfIn PDF document text
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/2703082.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/zivuguzuduvixuz_burodutisim_kugadufeviniwaz_lukufediwakeku.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/5fdca27d-c39d-4427-9743-163ae4f40cd5/83873251137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88195a3d-7d9d-4a72-a6fe-0c2224c5da19/zimuxuvugexitenanulej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/330adb3c-a9c8-46a9-8b1d-5dd96d93a84d/54716243268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72d1d581-80e9-4a23-b96b-ec54643e10a9/tawukenukitaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40e882b8-a517-4298-aae3-c0dabcf4d909/85485853486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aea703bb-5249-477a-b247-731ec2cb2975/87438830878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/031641ec-d488-4cd4-a26e-7e671e2506f2/10074612065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad399f5f-da7e-4b7a-9bc7-f34f316c09b9/68926412379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/162dc5b9-efe1-48c6-a0fb-a5b5aa92d3db/kexasilik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1841d27b-3a9b-4bd1-8bac-0d338d13bac1/jufovumuwezojifujax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc1e515-4d0d-4658-aa5f-df47c8ed90d0/sisexab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74fdbedd-0575-4708-b7b8-695d5eddfcd9/29745547372.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2891/3055/files/new_hope_training_and_sales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9572/9341/files/chicago_skyline_silhouette_png.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4097/6291/files/sixatomokidomijokizedaz.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_off00005fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD1 5412 bytes
SHA-256: 4e17ed10815f8620c00eadeb526ff5a8d625a3b0ed77dbcc354287a38cb0b80d
font_01_sfnt_off0000721e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x721E 10352 bytes
SHA-256: aa1f5dcdf50731729ffe2a7372137bb8f78735371f2e4db3f30f3dd75c31ce7b

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