Malicious PDF — malware analysis report

Static analysis result for SHA-256 f82f626b7cca3e3d…

MALICIOUS

PDF

42.3 KB Created: 2020-10-03 21:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 5e16d48a01234e144f0fa57bc25504fb SHA-1: 50699e77beafd8686ff850db7fce37cff69803be SHA-256: f82f626b7cca3e3d923aa18ffa7dc0d09241676b79aba8978b65f6585af7e5b1
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://ggtraff.ru/pify?keyword=holt+french+1+textbook+answer+key In PDF document text
    • https://site-1037114.mozfiles.com/files/1037114/gejarixisirapewatozigeti.pdfIn PDF document text
    • http://vemuviba.greenfield-bilingual.com/uploads/1/3/1/8/131856435/65072ad7365b3.pdfIn PDF document text
    • http://files.singramed621.com/uploads/1/3/2/6/132695546/sajibixuvagisor.pdfIn PDF document text
    • http://files.vomhiddencreek.com/uploads/1/3/1/6/131606127/kukuko.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/95bd9b8a-e9dd-4f99-ad98-9d35ba7c702d/juweravosekodazikitetuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed0dbe1-5b7c-424c-a9c5-0b61d911be3f/52462900837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cdd58ac-c346-4c3c-aa77-35834712ed3c/mawofupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2124/0986/files/16244003317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7708/5600/files/89406129966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1805/5591/files/lenewisugonemopiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5866/7430/files/69093137315.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6570 5448 bytes
SHA-256: 3f115b3121e070513beee4ed84d531a8e1d40c08ec29c7776e01374d6e4b5451
font_01_sfnt_off00007818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7818 10772 bytes
SHA-256: a12d824ee0b71a916ba92c4ebe8eb6c3abd3ce3551e6bf230655587e550fb386

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