Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b322846516ee820…

MALICIOUS

PDF

46.0 KB Created: 2020-10-08 00:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bfb1aaa2b6a75b580a1361557fd0f4d2 SHA-1: 26e83e195568524bfd3201e1622f639f98457d22 SHA-256: 0b322846516ee820d65e9b48051b6ba505f1c1c224d82d1b2a757e3409be97eb
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=500+days+of+summer+full+movie+online In PDF document text
    • http://files.gappraisals.com/uploads/1/3/1/4/131453486/8828667.pdfIn PDF document text
    • http://zasenet.cnycommunityacu.com/uploads/1/3/0/8/130874161/dewunib.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/1/0483/6714/1017/files/lelekefegovotasezofetifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1402/0505/files/bofugokukofetajigonareniw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2200/2587/files/pearlridge_satellite_city_hall_aiea_hi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4742/0057/files/50962346164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/8666/3846/files/skin_tone_rgb_lightroom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/280ffa06-cf0d-48e1-90ad-63028b50d6c2/79138056068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08b7acbc-cf06-48d7-991e-0a21b839e863/suremiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6626167a-b731-43eb-ba1a-d87da18299cc/pisokogikol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/689370df-82b5-4cf2-9196-bc41cc17f056/komesilarux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9731f4e6-bc08-4aad-a5e1-a236a5285774/jisalojatigivitizanus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c874fbb-ac12-4905-a63e-24787a9d8734/lojababesuzapukobuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e13ac58-3ff5-485f-ba2c-e191fa9ffa16/29536199241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff62fd9-5aed-47b3-9526-879ed79daa0f/xaletumejizijusotuxizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/168e56c6-c547-45fc-a89d-75cca2c78c23/29792656713.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_off00007633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7633 5388 bytes
SHA-256: e66bcdc55e4093eb61b636dbb465b54d736ce9e03d2cb07ace915d327f1fb9c1
font_01_sfnt_off00008880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8880 10088 bytes
SHA-256: af42b3e0ab835e5f00086c8094be4e2290cbb01a7b514cde4c71e17fd5d61618

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