Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f15200f507bcd05…

MALICIOUS

PDF

55.0 KB Created: 2020-10-17 01:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: fd687328cd51f5e5e4abdcb8778e8143 SHA-1: 55bb3e885ec98383876fcbcdbe65d83dfffbb893 SHA-256: 8f15200f507bcd055903ff8308f38249048ba7bb285c493e472b48263e79a8ee
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://ttraff.cc/123?keyword=operaciones+con+numeros+complejos+ejercicios+pdf In PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/f173ffb5f9bf.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/3e75a4e696b2f2d.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/niwemo-nekadubuwoto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8a14feee59b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373304/normal_5f8a0eb93b0b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_5f88b3754e90a.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/1/0434/0308/3928/files/cerave_renewing_sa_cleanser_ingredients.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0205/8678/files/60362387579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47016d5a-d71e-4d97-9f9f-3646eaf9ed53/wuboxuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96f94de0-deaf-41b6-bcac-9247694e174d/pokemigifejedepib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9db3028-5f3b-48f1-837b-d3a9abdf75f7/77315000296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d22f3f-965a-48e8-ad7e-3bd66199870f/99656757553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9782/6503/files/power_window_kits_for_street_rods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9242/5886/files/geometry_dash_icon_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2755/2661/files/46780003199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/2213/1615/files/cheat_engine_apk_no_root_needed_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f80ca880-72cd-4b4b-baa7-ba233a63e67b/66985283305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/367e70c9-a88c-4cd7-bfe4-e6440d5697f4/54175208771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60ca14e8-3e30-4cd6-99d6-aadb515ebfe1/13793109595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a6452b7-5ca2-4753-98c4-04f6f251bd45/20271157391.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_off00009049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9049 5404 bytes
SHA-256: 72ab82a1628da007afc4ad02480ecd5aad86eeec389e724b3713ef583b9f2e0c
font_01_sfnt_off0000a28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA28A 13308 bytes
SHA-256: a257641f9d252233677d99d84fa018e8329ebf98206a4e3d42234d92d1331ebe

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