Malicious PDF — malware analysis report

Static analysis result for SHA-256 42255ba2640c5ce8…

MALICIOUS

PDF

38.7 KB Created: 2020-11-08 10:54:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: e7b7004f0b7b30e929b94b8ae06bb828 SHA-1: 7d38ded59d565ce97981cc2a7bb770ada6637230 SHA-256: 42255ba2640c5ce89b5abcf4e574f5a6e1e6e59c0d84148c620468e80882d7db
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=capitulos+de+one+piece+en+espanol+online PDF link annotation
    • https://feleluxotikuko.weebly.com/uploads/1/3/4/3/134338959/nakalurimegi_tawomipe_meperopudo.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/sesafefanulokam/damn_yankees_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78a75809-e4ee-4bd4-9c55-5bae8cd0999b/51104278362.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/xakodebisabowojiregufelig.pdfIn PDF document text
    • https://wotibubimif.files.wordpress.com/2020/11/zokenazaluwasokafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0e4c6a5-2173-41d4-9958-7950a918aff2/xogugisa.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/handmaids_tale_quotes_tv_show.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/basic_irrigation_system_design.pdfIn PDF document text
    • https://virinumit.files.wordpress.com/2020/11/63640468683.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/23546907355.pdfIn PDF document text
    • https://batuvowu.files.wordpress.com/2020/11/zawivufixipufofukubox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5433c24c-d2a8-4fdc-a6dc-b0b347952b84/67160543436.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E7F 4876 bytes
SHA-256: dc17f4ae6779bed239c3b3a8af17e894f5a1f029893f287761b610079909ad16
font_01_sfnt_off00005f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1B 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off00006a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7C 9972 bytes
SHA-256: 65f6fd92ce0e80a4026e085f0a0754f743f3914f78b746ea8befbcc2065c4e25

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