Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a73bcd70ee8b95b…

MALICIOUS

PDF

51.2 KB Created: 2020-10-30 12:25:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: dd3ea10534ebb4cfdf7a36c998da9fcf SHA-1: b70504c0f27d72463abb3ca9d702a645190bf1d2 SHA-256: 8a73bcd70ee8b95bd5af09f0403e5393f5aebff4a0f7a04f6f0b9ef74bf4c87a
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://ttraff.ru/pify?keyword=mach+5+speed+racer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5f8c9d1779ca5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f873add8a18c.pdfIn PDF document text
    • https://vixepakezo.weebly.com/uploads/1/3/4/4/134447938/dibulego-liwizoleg-kutepumemuwor.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/7775416.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/2737a9a8.pdfIn PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/9907932.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/zuxadol/belajar_adobe_premiere_pro_cc_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdc61c99-e0e5-4872-86be-a64a8c800960/7331281119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c2d86d5-5676-47db-b261-ac8818f517ae/88768398906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3286/9525/files/47580058503.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_off000078d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D5 3548 bytes
SHA-256: d7aeffec6eb93912b7662f36c6f4c4174905b5a8cfeb3058e876aac9adb5f281
font_01_sfnt_off00008555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8555 5260 bytes
SHA-256: 3eb6c890fd4def2d13c5bb398a9b3d2a342f059ed97e41b3d9429c137100b7a4
font_02_sfnt_off0000973b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x973B 12624 bytes
SHA-256: 155ff25b1cecdc54a9f0da5378e12986f2c7be6030d1f64d1d2cae03a16fae45

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