Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9fa78bbd84b2d64…

MALICIOUS

PDF

39.3 KB Created: 2020-10-29 05:08:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4efe07616fda97233d5f28087e539371 SHA-1: a0470e29414c81bee1c3832647b2fb0d55eb4a0f SHA-256: d9fa78bbd84b2d641fefe0eaa2ebf59ff777b7e0ba444faab20c880edd311761
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://gettraff.ru/aws?keyword=word+within+the+word+answer+key In PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/vomivemavutu_sowomafiw_gujurox_junasokawisore.pdfIn PDF document text
    • https://direfuxapiw.weebly.com/uploads/1/3/4/3/134371974/4378622.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/lokujevu.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/1/0499/9843/0377/files/fanojiz.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/soot_bull_jeep_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/160466a9-7806-41ed-98ef-530ec4360f77/vajazatokewut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4010d2e-1d73-4d5d-92d5-166ae7fcb7ea/91079249256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbbf5d70-166b-4d27-a6f7-add20dafa9c4/90914142432.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/37501130764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ac4c453-32c5-4585-85b1-9f15912d0db6/89838843869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2536/4641/files/king_of_thieves_hack_apk_2.38.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75d36e8e-8b18-4fc7-8ee9-d53b5e6a8e07/komik_videolar_izle_kfrl_indir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/cashnetusa_promo_code_june_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5919502d-0bbc-45bc-be54-e32351e0cde8/72628871531.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b49677ac-9adc-492b-9131-20988f5a672f/77867362143.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/20063558282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/2166/4160/files/wikejaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9b64eb9-a534-43fc-9a7b-d51aa69cd3b3/53175219097.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/wovoxisimosozukigimuwiler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1016/5416/files/4_25_lbs_to_kg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b75ae19-8f3a-41e2-be5d-e16e5ad93827/wupusojotukumofawewujom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9652d1c8-37b4-41b4-aa84-ad8aa2221d77/58978850093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/280d78fe-4410-4e81-b0c7-ba1c7d06f607/lavupetebope.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_off000057cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57CF 5152 bytes
SHA-256: a102bf7462bb80280849aeb951d07abb19e5569449fba4445675a1efabcf98ca
font_01_sfnt_off0000696b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x696B 10856 bytes
SHA-256: a2a03b9f40fe1350eee1ec66aab5efc4272ff69a186cae8b4812c9e9a5606ff4

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