Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f7f5d53c51bf4f5…

MALICIOUS

PDF

42.8 KB Created: 2020-10-09 07:39:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 304166a9f3dcf6d3209d19013154ac3e SHA-1: 2919bb8814cd0dda43f55862fb0691ed7571e715 SHA-256: 4f7f5d53c51bf4f50beed6dd6ed7df5238f39ffc3a23de0725d191ad25721438
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://ggtraff.ru/strik?keyword=shenzhen+subway+map+english+pdf In PDF document text
    • http://files.amandabeekhuizen.com/uploads/1/3/0/7/130775690/d5ff23774ec07bf.pdfIn PDF document text
    • http://files.treadawayclass.org/uploads/1/3/1/8/131856331/e9d225e9.pdfIn PDF document text
    • http://files.wrightseaplanebaseinc.org/uploads/1/3/0/7/130739835/gatip.pdfIn PDF document text
    • http://files.tazgop.net/uploads/1/3/0/7/130776688/ginikavuvobeva-puvizigopuw.pdfIn PDF document text
    • http://files.lavenderrosefarms.com/uploads/1/3/2/7/132740253/7054971.pdfIn PDF document text
    • http://wozobam.coastalgeorgiaaudubon.org/uploads/1/3/1/1/131164239/pisejokesixosife.pdfIn PDF document text
    • http://files.mscykiert.com/uploads/1/3/0/7/130776476/6ed909dcf5cf.pdfIn PDF document text
    • http://files.collieinspections.com/uploads/1/3/2/7/132740852/c312b8.pdfIn PDF document text
    • http://vifer.whitebirchescamping.com/uploads/1/3/1/3/131398475/8770816.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/1/0430/6731/0231/files/oracion_a_san_jose_para_casos_imposibles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/what_two_colors_make_orange_icing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3224/7445/files/80360612775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0426/3585/files/52615065732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9483fc52-c4df-4b13-a17e-546371c2380e/regegipunewafoxefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd93bc2e-c1b2-41a1-b1b9-b1cdcefc7e3a/xovigirunipadulis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf92b591-0f99-4205-ace4-4d8a618cb4fa/kibokevuzikefawu.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_off00006718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6718 5844 bytes
SHA-256: 58f69a79125169df13b824e23fd04bc55d6fa7b9b3c8bfe5d51d399b35b22b5d
font_01_sfnt_off00007afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFC 10260 bytes
SHA-256: 7d80e730421d2dc8d6b475413551e3b1ef38b97e763fb970358d5e0ebf7a3642

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