Malicious PDF — malware analysis report

Static analysis result for SHA-256 839e6ad7e7d53fef…

MALICIOUS

PDF

41.0 KB Created: 2020-10-30 16:03:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 67a0206ccd567694c185c7cedfce3343 SHA-1: e81e6907c0e8e45565dcb292dffcb4cafe8f12c7 SHA-256: 839e6ad7e7d53fef63f69508b1db80672ed2ea669b72306a41230a7ebbae9578
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/123?keyword=the+client+attraction+code In PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/metor.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/volenobopini.pdfIn PDF document text
    • https://bodadesoka.weebly.com/uploads/1/3/4/2/134234706/8870172.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/4777c005db8b.pdfIn PDF document text
    • https://visuzajekug.weebly.com/uploads/1/3/4/3/134305902/wisafaxudedunilub.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000062b5.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000062b5.bin)
    • https://s3.amazonaws.com/tetazino/42802197534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4add81b-1e46-4656-804f-df8ed98571f0/pebuvulepekuruxavafaduxot.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/bovisorutefetufusepuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6abdf9f-6b3f-4f07-92f0-fae1fb81dda0/rasigapekojof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6c2ccf5-38d6-44e3-b5a2-1441bf889214/daseronipivekokilegag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25389e60-2ef7-41a5-9ab6-9e0513c7821d/72763359434.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/tefovoberutuxepunidiredap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70420c27-4965-439c-a7fe-11488ed8e9e0/wall_e_full_movie_watch_online_free.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_off000062b5.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_off000062b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B5 4800 bytes
SHA-256: 0fac293a8e07a5b582a8ff3835801eccbbed7f6ca49609e6d4945ac77aea3924
font_01_sfnt_off000072fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72FA 10648 bytes
SHA-256: f6652c4d7809a63faff7a77984e52cf1b93c82235d04d5a348e86553bb1f0e57

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