Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47b6c851d653870…

MALICIOUS

PDF

42.2 KB Created: 2020-11-07 21:00:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 81d3ce783a6bd8443db5bd18afa00112 SHA-1: 2bff00d0466ea21d8690890b1e029a17ff91559e SHA-256: f47b6c851d65387017a138978d5441c07f67fa8b3f214d54c778cff00e5808a6
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://molisemopum.weebly.com/uploads/1/3/1/4/131437834/mororuw.pdf.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffset.ru/aws?keyword=roblox+free+accounts+2011 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372100/normal_5fa4624592be3.pdfIn PDF document text
    • https://molisemopum.weebly.com/uploads/1/3/1/4/131437834/mororuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393883/normal_5f8f0a01019f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5f8ffe25a7a04.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/pisedij/probability_density_function_exponential.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/ascii_code_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/us_states_and_capitals_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/computerised_accounting_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb3311b6-fbca-4326-8a0b-0513ad4691d8/16889284164.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/wefegulanadafuxaxesab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc9d5ed3-1efe-4adc-a6e5-9f6b6a111882/74643995878.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/fovusezolija.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_off00005cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF1 5416 bytes
SHA-256: 5d74e7aacc29277855746231cc58bce4310a3b75479c994e0c395149cabdb565
font_01_sfnt_off00006f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F77 14032 bytes
SHA-256: 39d707c23fb7de57ab92169db97fd3ced142e3386904711971c5608c3e168184