Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc4047672262154…

MALICIOUS

PDF

40.3 KB Created: 2020-11-02 22:29:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: f9542b8250afd5409c51444218f0c6fa SHA-1: 3a73ce28258fe810dd15b3a524584636b5f4772b SHA-256: 6bc4047672262154cc257a334befaf84edfead501eb9be81990a3fb24c85263d
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=fortnite+account+generator+2019 In PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/aa94aa7f99c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f8b901138eb2.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/xiluvelu.pdfIn PDF document text
    • https://jifurutirijiguj.weebly.com/uploads/1/3/4/5/134528482/lowibixewilewugij.pdfIn PDF document text
    • https://pedomolakikivo.weebly.com/uploads/1/3/4/4/134440841/c2911b68dd8d1f5.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/2755526.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/kisoneje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403565/normal_5f968c8aad3ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372955/normal_5f8a9d43d5235.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/zaxamagiputijor-wesakavul-kewaz.pdfIn PDF document text
    • https://guzebiba.weebly.com/uploads/1/3/4/3/134368687/xiwof_bubux_paxaliv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406213/normal_5f9a73e771f37.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/8993817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f8eddd64210f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403539/normal_5f94ae1759ccb.pdfIn PDF document text
    • http://gamerscrew.xyz/fortnite/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000574a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x574A 5196 bytes
SHA-256: 59d68bb382efb79dfdd6f6a884beb99979fa7b9bfb3b31d7978548b6d726f7b4
font_01_sfnt_off00006902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6902 2080 bytes
SHA-256: 7f5b718fd96f57a2153e301ddc7dd89e5fcdea4933e749ab3aeacdebfd26f085
font_02_sfnt_off0000729b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x729B 9716 bytes
SHA-256: 1c0d69fcfaacdeaa44727ea58208f1ff34680f887eb3a9a44ce93aadc22db8b0

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