Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8514f597c1a514…

MALICIOUS

PDF

41.5 KB Created: 2020-10-30 19:37:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 537870d2485c94a353a259bdb17e7ee2 SHA-1: 59ad18a381972c5e28c736d98e2df7961ea9d100 SHA-256: 0f8514f597c1a5141d61d05c76da4d25affdf768272141e5d3d254f651e4d269
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://cctraff.ru/aws?keyword=photoshop+white+balance+tool In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f89bc071ab49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372681/normal_5f89a4be33e25.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/07808b8c-90c3-48de-a411-1fd63941fe80/lofujowojusivotorepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fd910e9-75e2-443d-921f-4a357de5db51/sujip.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/bosch_oven_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83d71c6d-f366-42fe-8e7e-c9bf55e2f979/7908413473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e22f377e-f9d7-4198-aecb-41a60471eec7/kirisuzezitesasapamagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/263404fc-b5fc-4e16-9598-c03c34763b7f/hp_p3015dn_toner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cd43c97-5450-41d1-b946-9653be30b894/jefupevuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8227710-e75c-4365-afef-29ffbbbe3bb8/15075101395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6803/0621/files/36464252164.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_off000062f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F7 5160 bytes
SHA-256: 326af151575a0c5f60a937c27f34c77f11d0f3ee0fa6b592c2ae9658420a1eac
font_01_sfnt_off0000748e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x748E 10808 bytes
SHA-256: 223572b1292c0d3771cd8e9848204f4687c4daa15f15714b9ddaef3349a75dd2