Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d1e666ddc65fc6…

MALICIOUS

PDF

42.7 KB Created: 2020-10-17 18:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 0f5a808e1fe7b11aa73c3ed2c65cfe00 SHA-1: 32a890c4ba2a625d1f9d0691bd0c3863857e7c9a SHA-256: e5d1e666ddc65fc65c5439c67efa94f7885df06fb93a7803d565ac9a7d946275
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=tradutor+ingles+portugues+para+celular+android In PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/1383121.pdfIn PDF document text
    • https://gumomamomav.weebly.com/uploads/1/3/1/3/131398069/5573046.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/fb35a204ad7.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/1d1f8ecc085ca.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/4928163.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/2795039.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/10610.pdfIn PDF document text
    • https://folukufisika.weebly.com/uploads/1/3/1/3/131384255/7f92d.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/1429013.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/acs_study_guide_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/a_raisin_in_the_sun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/7114/4604/files/gawixiwiwejos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9df86906-94be-47a9-9c43-4463f820e5b9/67186740803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d921499-9aae-4705-9954-91dd06b0bce0/48800473436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf6a9d8b-b1ff-4d95-82af-7fe0c905669d/how_to_download_minecraft_maps_on_ps4_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d16a89b1-51df-456f-9ec1-fd6753f604f6/5161108401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4efd3bce-b1fe-496b-9304-506477cef640/17051695398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9821/6858/files/pressurized_water_reactor_power_plant_ap1000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/giwonotomotojaweju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7130/0268/files/52840098747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/rewegikizetedudabubata.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_off000065a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A7 5192 bytes
SHA-256: 785b270de6614ce0e111d7ba83600e42a8e4b475c622d97120c9c454833493d0
font_01_sfnt_off0000775a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x775A 11832 bytes
SHA-256: f765be2a7f0055f13c469263796d1e3f7924ee8c2ba96e55cfe94346e023a723

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