Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea07357b255239c3…

MALICIOUS

PDF

66.7 KB Created: 2020-11-03 02:20:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b9a4a5ea565bb9f3d043dd10927864de SHA-1: a7e12c1ef4fe1355b86e8d802d7d20c21811fd78 SHA-256: ea07357b255239c33ad9d5f8be6740ee5df3b5acd99c1aafc20a54bc354b165d
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.me/123?keyword=juegos+gratis+de+maquinas+tragamonedas In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385862/normal_5f914321247a7.pdfIn PDF document text
    • https://gosasomaf.weebly.com/uploads/1/3/4/3/134370397/7c759cfc.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/zidenigad/bicarbonate_therapy_in_severe_metabolic_acidosis.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/26019967252.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/kikifipewaxuzigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c7949c3-35ee-473c-8135-d714ec00d694/tagosodozeraku.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/spider_life_cycle_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/1145887876.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/breve_storia_della_lingua_italiana_marazzini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05db53cc-0772-4f40-bd76-0b454a7a7b28/mapaxirudasepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3548/3038/files/kudawasolaxisenivusorudet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2572/6118/files/63784552296.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/advanced_mathematical_methods_in_science_and_engineering_hayek.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/realidades_2_capitulo_1a_examen_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB661 5228 bytes
SHA-256: 2a86d2936ff0109b5bddfa1843839dafb1c2a9ca56c3563872b640eb150127ca
font_01_sfnt_off0000c7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FF 3228 bytes
SHA-256: 80509ed5f9999b12fcaaac46c09018190c30ed74331219ffe8b73796158f5efe
font_02_sfnt_off0000d492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD492 12444 bytes
SHA-256: 56bc478e4609e6e5555d3ba24a67d4ecc399edd33635dcaba666ee68bbf9bf90

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