Malicious PDF — malware analysis report

Static analysis result for SHA-256 76bbc0314cebaf7b…

MALICIOUS

PDF

35.8 KB Created: 2020-10-25 07:35:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: e36652c58d1e778e93407a4723e5a0c7 SHA-1: d75f625b36504edec502379861d4aa15aab6cf41 SHA-256: 76bbc0314cebaf7bfd1208eb7597bea05a4e84023dc2635409d60a8ae4fa7584
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=abschlusspr%25C3%25BCfung+englisch+realschule+pdf+hessen In PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/8424024.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/c22f8.pdfIn PDF document text
    • https://sitizoxibe.weebly.com/uploads/1/3/4/3/134317871/wutabuvip.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/wonoti/23964045209.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/85380538573.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/asia_political_map_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/vevogimonumulu.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/informe_de_auditoria_de_sistemas.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/mtvss_access_consciousness.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/approaches_to_college_english_teaching.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/cabanellas_diccionario_jurdico_elemental.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/83480541362.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/forifepalojerugolimuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4930/3202/files/fastest_99_fletching_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1900/0229/files/68341895102.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0671/2219/files/photoshop_cs6_tutorials_bahasa_indonesia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/569a7ad1-9f77-4049-8968-c14ae875de63/31932474980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb1b5634-773d-4d29-9632-bdf477dde560/fagavitaterojirizatagoj.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_off00004a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A61 5668 bytes
SHA-256: 8e1c8a605c56882567fbfdc4998b397a4dfb8c0481205277b8a52e536d843f38
font_01_sfnt_off00005d6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6B 10684 bytes
SHA-256: dea5522b4bd6f689726406a9f013a36e76f3485e8d376855c390ba8391babccb

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