Malicious PDF — malware analysis report

Static analysis result for SHA-256 937a864e7db3f392…

MALICIOUS

PDF

44.2 KB Created: 2020-10-21 23:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 24b9c694774d400050d82f4fd5133f20 SHA-1: ef211eb027e2cd70c5053b83beba354cb6147cb6 SHA-256: 937a864e7db3f392a73f9e9c69611082b54b40397938057ef8b98c700d049d45
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://ggtraff.ru/123?keyword=bookkeeping+workbook+for+dummies+pdf In PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/5937df.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/6981840.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/3481771.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/e45bdeeb4f93.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/63123db.pdfIn PDF document text
    • https://nurekagenarufab.weebly.com/uploads/1/3/1/6/131636906/5755884.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/jowubojebekubemul.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/7593107.pdfIn PDF document text
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/7373535.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/6701533.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/136252.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/0c18874847f.pdfIn PDF document text
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/25bc0524621.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dea13e6b-1606-4efc-adbe-b80710bda4f8/96766181043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e2fc510-b816-48ca-bdcb-81caa6cacd88/genaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e97471e9-3d24-47da-852e-12f06c3bbb94/febipililidufupamituwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4563/3693/files/chest_ct_screening_for_lung_cancer_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1415/1589/files/82506859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6104/1559/files/download_apk_pokemon_go_hack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2188/8409/files/13194303518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0472/3130/3845/files/22396936851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7782/3385/files/family_feud_sound_effects.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2238/4793/files/pitiloverexiwozuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7098/0245/files/vba_for_dummies_free.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_off00006e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E70 5464 bytes
SHA-256: 5a83d3d125868da2f32514ebc734ff41dabb936df528d76abde89e62e2d9ea73
font_01_sfnt_off00008103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8103 10084 bytes
SHA-256: 5cc3fa7948b476679b6ba67fd16d8fd830839128c7d536ab05097535fb3964b0

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