Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e31176db5fb040…

MALICIOUS

PDF

34.3 KB Created: 2020-08-11 00:40:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7b5e822b362473b49eb7ed7c75c718a6 SHA-1: 26cfd91cd3abf0d75a655643db1c1f2df6046266 SHA-256: e7e31176db5fb040a3537d247718ac577f110edae1444b6ade185300cab95b21
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.cc/pify?keyword=accounting+and+finance+for+non+specialists+10th+edition+pdf In PDF document text
    • http://files.giuliosartisanalpasta.com/uploads/1/3/1/1/131164476/toniguriw-zanafomu.pdfIn PDF document text
    • http://files.agpixplace.net/uploads/1/3/2/3/132302814/gegezabek-dufijeves.pdfIn PDF document text
    • http://dotepevik.resumephenom.com/uploads/1/3/0/8/130874493/gurifudizugano_ruwupugevi.pdfIn PDF document text
    • http://jetipubof.partainsenglishclass.com/uploads/1/3/1/4/131482995/7885311.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/1/0431/5706/1781/files/nevolew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5806/0703/files/jopor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8456/2086/files/farivorunanunosutuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/57579014060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/2791993132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9272/8224/files/88425613009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/9090740429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0714/7166/files/naguloxel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/16259234543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2137/5387/files/fap_titans_cheats.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_off000046fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46FD 5600 bytes
SHA-256: a0da2ae47db22b01ffbe94232d2e1bf18b0440a20f32f74230294cd3f48448fa
font_01_sfnt_off00005a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A04 9936 bytes
SHA-256: 35e22047f67ed5688960fe724948a5874d6b33c4d9fcbd64fc3bb4efdb71bd13

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