Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b778ab86e601eb…

MALICIOUS

PDF

41.5 KB Created: 2020-10-25 06:56:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 93d068bead9f234bee18741b84e02a03 SHA-1: 71293304752432e481cf9ee6e2f6232f09613d46 SHA-256: 91b778ab86e601eb678e9a78f2a1066ff19329cabfb6b44d56b75c8224032c72
124 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.
  • 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.link/aws?keyword=biocentrism+book+pdf+download In PDF document text
    • https://jojawetoterul.weebly.com/uploads/1/3/4/4/134404105/9375735.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/jazefiwoxelo_moxesolikumu_jiwevudon.pdfIn PDF document text
    • https://sipavokipepino.weebly.com/uploads/1/3/4/3/134330850/3932101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369317/normal_5f8ad0a5cf2a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384035/normal_5f8fffcc0866d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404293/normal_5f9237262578b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_5f89e8e9b7d5d.pdfIn PDF document text
    • https://nobigifawu.weebly.com/uploads/1/3/4/3/134310244/2561643.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/2228231.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000063de.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000063de.bin)
    • https://uploads.strikinglycdn.com/files/23897b49-a294-48dd-95fa-d66409feb284/sukuvijaxogopezotozofomub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c12d2d4-0ed0-4a91-bda9-889fde7f4fa7/nivenater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de45b831-5dca-4170-a2b3-74fb0ced778d/92805989968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e72bb1d-c356-4db9-afe6-cd4b54fe673e/49035541712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8871fbe7-ced2-4692-a199-208dc43e17a3/todivinanaxoti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd2b8c2b-2ccd-4a5c-9ad9-411e44e68c01/96462941882.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/archaic_greece.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/6th_pay_commission_wb.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/classifying_real_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/sap_workforce_management.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/afficheur_bcd_7_segments.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 extracted file (font_00_sfnt_off000063de.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DE 5648 bytes
SHA-256: 2f52c50b41be0cc9d6cb8b56ef979fa50fef53dbb26dfc0a10a31bf9d4422404
font_01_sfnt_off0000770b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770B 9924 bytes
SHA-256: b7c84880532a8be955b6bd13f40184fd801834337c148f30d4f643c22b72dc32

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