Malicious PDF — malware analysis report

Static analysis result for SHA-256 1773fbb72d6936d9…

MALICIOUS

PDF

42.2 KB Created: 2020-11-08 13:14:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 6d7b64ed9a8879bcbcda8f9696991d30 SHA-1: 59d0824d046a9d06e760092a15fecf4b31f08b7d SHA-256: 1773fbb72d6936d9239ac91e566f31d68f4d9f8770146616de0d8c4a3c2e59bb
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=2020+estimated+tax+forms+nys In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f8a2031ac0d2.pdfIn PDF document text
    • https://demogevofowa.weebly.com/uploads/1/3/4/6/134608938/totizetakosigud.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/f99449e32f852c8.pdfIn PDF document text
    • https://fafugugopogewip.weebly.com/uploads/1/3/4/4/134464831/1677104.pdfIn PDF document text
    • https://lewonodi.weebly.com/uploads/1/3/4/3/134330754/babekevewafexi_fumubukaf_lomabipoti.pdfIn PDF document text
    • https://zodovamerevi.weebly.com/uploads/1/3/4/3/134316438/sajal-kujopusola.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xenogiw.files.wordpress.com/2020/11/nonosumediwopadem.pdfIn PDF document text
    • https://pazeden.files.wordpress.com/2020/11/86767518253.pdfIn PDF document text
    • https://metevavub.files.wordpress.com/2020/11/herculaneum_podcast_audio_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0735267f-9975-47f5-a19a-3a0c5360c90d/zozoganavopalitogivixapip.pdfIn PDF document text
    • https://suvarofora.files.wordpress.com/2020/11/lodebukiworidu.pdfIn PDF document text
    • https://livilixojef.files.wordpress.com/2020/11/jirinemupikivabazijefel.pdfIn PDF document text
    • https://fibilumalume.files.wordpress.com/2020/11/84183443909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6db405f0-dc66-40d2-8721-349e5fce9f91/53908999667.pdfIn PDF document text
    • https://josilakebula.files.wordpress.com/2020/11/70388047566.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_off00006691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6691 5368 bytes
SHA-256: 7654e993298d4878fb8f5fe97f04a5c374a181073f95b79a37a4aa10314d8a1b
font_01_sfnt_off000078c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C7 10232 bytes
SHA-256: 338242776e9191a8f92376348a83b6e6ca67f30c2bea70286645396caf524a78

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