Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ed2cbf76e3d9ca…

MALICIOUS

PDF

69.2 KB Created: 2021-03-21 03:44:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 04cb933ba99237d2016b97328ee2d0eb SHA-1: 85995ceb31cf872fd1d0cfb72bcb5cec21adcf4a SHA-256: 27ed2cbf76e3d9ca5ce6f3541122ac7eed9dbdf5b766ac1fe4ac01571dd12c7e
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The ML classifier strongly indicated maliciousness, and the presence of external URIs suggests an attempt to lead the user to a compromised or malicious site. While no scripts were directly extracted, the PDF structure and heuristics point towards a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xezojetit.ru/award?keyword=sahih+bukhari+free+download+pdf PDF link annotation
    • http://zevibeponakat.getenjoyment.net/easy_scratch_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450147/normal_5ff36c61a5034.pdfIn PDF document text
    • http://nout-prokat.website/vault_of_glass_guide8qpu7.pdfIn PDF document text
    • http://xilenemivagola.mywebcommunity.org/ritute.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464870/normal_5fff710dde9f5.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/update_android_auto_apkm7927.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/5pcZhhb/38252581522.pdfIn PDF document text
    • http://inscarusa.info/what_causes_a_washer_to_not_spin7eu63.pdfIn PDF document text
    • http://tozaworewinox.mywebcommunity.org/articulo_4_dela_constitucion_politica_de_la_salud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417997/normal_5fc5b6da866ff.pdfIn PDF document text
    • http://baliferifopiz.mypressonline.com/nikidenagikiboverex.pdfIn PDF document text
    • http://faponabon.mygamesonline.org/pdf_to_autocad_converter_with_scale.pdfIn PDF document text
    • http://xasumemazekejo.scienceontheweb.net/77930831047.pdfIn PDF document text
    • https://cdn.sqhk.co/parabeset/CMhemji/78817716284.pdfIn PDF document text
    • http://jakor.pro/73273085877whjz2.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/ghUibzO/photo_video_maker_app_for_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377642/normal_6024c2338b32d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuwedilejom.myartsonline.com/beckett_baseball_price_guide_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/new_bengali_movies_2018_site.pdfIn PDF document text
    • http://sinusudixuxuwad.atwebpages.com/begimogoruzemo.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/kozapatajosofosifula.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_off0000d119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD119 5352 bytes
SHA-256: f841488ae9eba213276448e6e4092d1503f31c3f15a49873633fcd8164c5b077
font_01_sfnt_off0000e353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE353 10808 bytes
SHA-256: 59377b6169a87eff81ea0bd405b2525f12ad002928407cbaee94ac30033d425c

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