Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b561a8594d3f502…

MALICIOUS

PDF

44.8 KB Created: 2020-10-29 08:28:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: e3abd2aa56a38c8c421b489bafcf640c SHA-1: 6ffed78852070c699b06f8a8de24aacd9c1f94d1 SHA-256: 1b561a8594d3f5027fd599a6303af501f044d204fa4f72744a49328dd68f39d6
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.cc/123?keyword=meditation+meet+spirit+guide In PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/jifijaju_mipevosisusol_mititetoluzik_levinoguvir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377663/normal_5f8c8f535e667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425726/normal_5f98ea81bae3a.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/rekurametadu.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/sizalumevowabodum.pdfIn PDF document text
    • https://purusoze.weebly.com/uploads/1/3/4/4/134495244/ee9d8611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383131/normal_5f8f07848ae68.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/poliwuvidekamu_werakurijegig.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/2c8974958f5e02.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/be3704f20.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/leguvefu/tratamiento_candidiasis_oral_nios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7817/3343/files/structure_of_endoplasmic_reticulum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ece4034-52f5-4442-a893-beeae573962a/69076835701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7872/5021/files/miller_spectrum_375_air_requirements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1856e413-a2a3-4ab8-a000-29c40dd91760/75297844854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5131510f-006a-47e4-ad23-0f571711b59f/fawutune.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/tc_electronic_harmony_singer_manual.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_off00007016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7016 5252 bytes
SHA-256: 27ec26f2871e60d1c68266223fb573055556f2ab210c919dd7a1e846869c44ec
font_01_sfnt_off000081e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E0 10652 bytes
SHA-256: fae72cdf3e312389ad4bf08e97165734f2275cbf981f0d22b53686f4b75f73d4

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