Malicious PDF — malware analysis report

Static analysis result for SHA-256 8769da233c01dd03…

MALICIOUS

PDF

42.7 KB Created: 2020-10-04 18:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 24b6b37ccb29b6265e0be1ca20c89995 SHA-1: a19b230afb7560b3522387d23bd58e20495fdc00 SHA-256: 8769da233c01dd03d859d5b8195b740a4ee609366b7d1a4dbc4e8286d192dd9b
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://gettraff.ru/strik?keyword=partituras+flauta+dulce+pdf In PDF document text
    • http://majuvo.anxietyalleviated.com/uploads/1/3/1/3/131398020/5629777.pdfIn PDF document text
    • http://pabujex.bgiapts.com/uploads/1/3/2/7/132712253/8560879.pdfIn PDF document text
    • http://files.classcastpodcast.com/uploads/1/3/0/7/130775971/3227007.pdfIn PDF document text
    • http://wawovewab.idagroverec.org/uploads/1/3/0/8/130813632/9721990.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/1/0478/4544/1695/files/toram_online_quest_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/orbital_box_diagram_for_tin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/thai_lottery_123_com_new_papers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc9ab916-2d20-40bd-8437-be9db321c245/jizijalipisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b9ca842-a3ac-48cd-98a1-3f07b7333f42/10763417236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87877cd5-4e78-4ecf-a4a4-9bc72dbf9663/80977462212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1fb33e7-1412-453f-9219-c7a03652c844/jagapajiwax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/688a32a2-506a-4948-8786-855be6e68a57/mozelezufej.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_off0000698b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x698B 5152 bytes
SHA-256: 050bd1a53761839c9e9f5fc35bbd9735d8642ca65073f2b3b94cfa095a1d9a41
font_01_sfnt_off00007b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B21 10396 bytes
SHA-256: ba5645189372bd5f7a3168a8a6c0455f0c945ed4e7c07c68b4c84c9f4396db29