Malicious PDF — malware analysis report

Static analysis result for SHA-256 18c15667e1557d9d…

MALICIOUS

PDF

44.7 KB Created: 2020-11-02 00:49:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: c0f7a9261de5ab262709aec174bb4432 SHA-1: 650b01c8e1dd91ad9acdfcc2681746af5cf724f9 SHA-256: 18c15667e1557d9d774ffa71692aa5dbc40f2f29744efa1d437a205b62d558e1
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.link/123?keyword=we+all+looked+up+book In PDF document text
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/vefenafafa.pdfIn PDF document text
    • https://fulafokowezoje.weebly.com/uploads/1/3/4/3/134384829/givibomadofi.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007127.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007127.bin)
    • https://uploads.strikinglycdn.com/files/ef11a1e4-1c94-4c6a-bbd3-cf9d5500eba2/ranelowuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b07dc176-eec9-4a4b-bc72-843ba2babf64/armor_of_awe_quest.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/generos_periodisticos_interpretativos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d5040ee-f5e0-47ee-a706-67f3705950cd/western_blot_tecnica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2855777b-95c6-411b-914d-b8c14b318515/96310515813.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/wifislax_apk_para_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04d668f9-ceef-44d0-bd2e-e873b01391f4/wazixilebogowoxuvizakili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c9c6938-ec12-4a6f-9685-7519004e5bcf/jolepaveba.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/to_kill_a_mockingbird_important_quotes_chapter_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a68f62c-64c5-42b1-a4cb-b17f17f04f21/buy_a_pomeranian.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea45cec-072c-46e3-b2b1-f1ead1b8c94b/89984652026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf3dc35b-ab05-4f99-a633-af85d1e50253/94250848446.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 extracted file (font_00_sfnt_off00007127.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7127 4896 bytes
SHA-256: 187cb9df5c750939e00206bb51981b54b650262d52ce42878769dea98d43116b
font_01_sfnt_off000081eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81EB 10644 bytes
SHA-256: 2e5a3b1af47494121ab6482e681b978acf487a77512897491ac18aabc4b3c1e1

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