Malicious PDF — malware analysis report

Static analysis result for SHA-256 57437480c8e017c4…

MALICIOUS

PDF

60.2 KB Created: 2020-10-06 22:26:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: eb7876aff7f60a1d0dd5143911b0d94f SHA-1: 7e3b05e69fa5c34e2251d3fb6add27c694326811 SHA-256: 57437480c8e017c439717021258f775dd9383303dc13f24c05f3076119f715ae
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://gettraff.ru/strik?keyword=pengertian+agama+hindu+pdf In PDF document text
    • http://woginotun.aculinks.com/uploads/1/3/0/7/130738848/wokawubagewog.pdfIn PDF document text
    • http://files.megadryforce.com/uploads/1/3/1/6/131606262/xosipavedexebeju.pdfIn PDF document text
    • http://tipinele.wilsonceramicknives.com/uploads/1/3/1/8/131857315/zejererufimaf.pdfIn PDF document text
    • http://mefozaneb.litturi-photography.com/uploads/1/3/2/7/132710567/rijusiwub.pdfIn PDF document text
    • https://site-1043035.mozfiles.com/files/1043035/pimesiwobet.pdfIn PDF document text
    • http://files.katjakleinberg.com/uploads/1/3/1/6/131637789/xazitili.pdfIn PDF document text
    • http://wibuz.maidofclay.com/uploads/1/3/1/8/131857243/17eead3c2815792.pdfIn PDF document text
    • http://kexemege.khadineyoga.com/uploads/1/3/2/6/132681396/tedobalikebop.pdfIn PDF document text
    • http://vojoluk.vmvisuals.net/uploads/1/3/0/8/130874317/8256116.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9090/1144/files/second_declension_latin_quizlet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5087/6578/files/43037186962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9604/6752/files/how_to_run_c_program_in_background_linux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1488/0919/files/nelly_song_grillz_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8164/4697/files/89723961800.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_off0000aec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC5 5248 bytes
SHA-256: 0890bbb9e44467817642082f991126a084fed434e9de0f530d29ba94e43168f9
font_01_sfnt_off0000c076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC076 9908 bytes
SHA-256: 4a1639295813e6fef0cefaecf5bc3699daf9c010728e9547dfde35a46d9e54b1