Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8130c6c169b1d9…

MALICIOUS

PDF

36.0 KB Created: 2020-11-09 06:32:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 525acba5fe426c0ad58fbb108db4d022 SHA-1: 1dc43c0fdae0d1897f05926fe828c9ed43e7ad59 SHA-256: ee8130c6c169b1d95873de4bcef2a532a1b74b26f0ed44cd3105769a4efa11f5
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://traffking.ru/123?keyword=biblia+de+estudio+del+expositor+pdf In PDF document text
    • https://kaxutaxi.weebly.com/uploads/1/3/4/3/134387751/rimukufifurav.pdfIn PDF document text
    • https://jebowevut.weebly.com/uploads/1/3/4/4/134493782/4469798.pdfIn PDF document text
    • https://sopulekazixov.weebly.com/uploads/1/3/0/7/130776801/pizuvepivepikux.pdfIn PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/wotisutemodux.pdfIn PDF document text
    • https://fekagisikazepi.weebly.com/uploads/1/3/4/6/134680816/07b0dae.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/nukadojege-mupamanalom-vebaso-jesejivozibijas.pdfIn PDF document text
    • https://wufikasokuwomoz.weebly.com/uploads/1/3/4/3/134359410/8971593.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/tubizipama.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/63196263062.pdfIn PDF document text
    • https://tilidefixof.files.wordpress.com/2020/11/baby_geniuses_full_movie_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/calendario_2018_mes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a4c78d6-3947-45ac-9bed-908cd4a03180/saniwixof.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/sudemowitadulufotala.pdfIn PDF document text
    • https://zovupalan.files.wordpress.com/2020/11/59971271070.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/mccormick_middle_school_huron_ohio.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_off00004b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B86 5292 bytes
SHA-256: 8e794fb85c375a410d3acb3be7dd8f21754beab634c2d37aea10a4fb6774ff81
font_01_sfnt_off00005d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D91 10984 bytes
SHA-256: aab5e3787685b0683988e6e57cf8a6da16dcceca5eeebd03af79e287b5cbb69f

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