Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa1de17380c35ea…

MALICIOUS

PDF

41.1 KB Created: 2020-11-09 11:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 33a1a4cb64c3e5623eb95641217a28cc SHA-1: 637e96097387fe2180d924102a0507718428ab3f SHA-256: 4fa1de17380c35ea5fae2b616f8802f2add843253490992019314bd905f1a790
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffking.ru/aws?keyword=preschool+crafts+for+letter+o In PDF document text
    • https://cdn-cms.f-static.net/uploads/4485163/normal_5fa908f6a100f.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/tezofuretejom/61151502044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3f64795-3b84-4230-97c0-7724566ef4e0/quantum_physics_for_dummies_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a63c88d3-29cf-4677-83a7-5ac55e82cb18/sazejedozaniririvuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e687280b-f373-4546-a0f1-f2fa850eb67c/93087064761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3810e243-603d-40b6-bd6e-36d659424226/jutor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3dc21ff-696f-4b7a-86e2-b246d57aa61f/13549406186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cb565c8-f1a6-4f05-b9c2-b173fc2e3a21/85513781531.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e6b36f-d758-4f87-a8fa-1f17b2e4b399/neopets_igloo_garage_sale_restock_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a0b1708-04b5-49fc-83fc-5e9251355c12/mubudox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d58a8c16-df38-48b4-bae1-6cc87f5fbff3/99262036477.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_off000059c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59C1 4968 bytes
SHA-256: 216f8fafda3cf405dfa58e92abce0de0490961c16a1a139cdc7356e4013f882f
font_01_sfnt_off00006a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A98 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00007326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7326 10744 bytes
SHA-256: de50da74de02791f4b216504f89ad4387a58208caafbd83fc2fc852a9438a1cc

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