Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd78a0d70de3402b…

MALICIOUS

PDF

41.9 KB Created: 2020-11-05 18:55:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 64444caa59328c8bd05efbe3b1e3ca0d SHA-1: 279d7d6158e2587f45079adf8c3608d079ad0591 SHA-256: bd78a0d70de3402b6aeffea6ff7bd9d6e00c9125f9f51e870fa8827ae0791fe8
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=a+deadly+wandering+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5fa214c6aadee.pdfIn PDF document text
    • https://gatofofuxiwiv.weebly.com/uploads/1/3/4/2/134265530/wusinogeri-jotuxu.pdfIn PDF document text
    • https://miwilokak.weebly.com/uploads/1/3/4/3/134375457/tilar.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/liguwodosimefet-fexamadora-fomubidotoje-buzeraxif.pdfIn PDF document text
    • https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/dezavelenugate.pdfIn PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/9433283.pdfIn PDF document text
    • https://sivagodumojuji.weebly.com/uploads/1/3/4/2/134235915/a4572995f49bf.pdfIn PDF document text
    • https://weduxuvup.weebly.com/uploads/1/3/4/3/134308116/giwegejofiveje-jonuvafilologi-fudap.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/jazofi/29526108803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/606aad24-31bf-41fe-b421-940238bde2f1/53354630484.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/dowukabaxinosid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67f9d548-24fc-4e19-b0fd-5c4d460d12b2/lugedimapabigipojapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0d34979-3768-461c-99c4-8de141dfb12f/bubavojabeboxa.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_off00006582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6582 5212 bytes
SHA-256: acf0b6344de455648d599cc4924924d0450d1363f9524952db46dcabd7b9e88e
font_01_sfnt_off0000776b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x776B 10460 bytes
SHA-256: a56e89601d01d14ecd6c0b94930ca49ad3a0197f61249db82fd40bb774bf558d

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