Malicious PDF — malware analysis report

Static analysis result for SHA-256 de8ee36ccaad7e82…

MALICIOUS

PDF

40.0 KB Created: 2020-10-03 03:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e17934f9f6652cf6c50368f3184ad315 SHA-1: 31b47c3d912c304ba6ce5c9f8d4985afd1264e35 SHA-256: de8ee36ccaad7e829530651cd33ffae210333869136ab75af4981a4d637ac95b
164 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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=samsung+g532g+combination+file+free In PDF document text
    • https://site-1041286.mozfiles.com/files/1041286/zopimujorarika.pdfIn PDF document text
    • https://site-1036862.mozfiles.com/files/1036862/2592330983.pdfIn PDF document text
    • https://site-1037214.mozfiles.com/files/1037214/47466597271.pdfIn PDF document text
    • https://site-1039143.mozfiles.com/files/1039143/75113423080.pdfIn PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/21003761224.pdfIn PDF document text
    • https://site-1038397.mozfiles.com/files/1038397/rogalagigeginasopupos.pdfIn PDF document text
    • https://site-1037106.mozfiles.com/files/1037106/zefadativi.pdfIn PDF document text
    • https://site-1038774.mozfiles.com/files/1038774/38137937207.pdfIn PDF document text
    • https://site-1036821.mozfiles.com/files/1036821/zixefigofifukodaguvo.pdfIn PDF document text
    • https://site-1040208.mozfiles.com/files/1040208/sokalazuwijasurubir.pdfIn PDF document text
    • http://files.jelopez-stage.com/uploads/1/3/2/7/132710748/menowe.pdfIn PDF document text
    • http://zowasugi.busybeesclifford.com/uploads/1/3/1/6/131636825/6321342.pdfIn PDF document text
    • http://files.weare-thebeat.com/uploads/1/3/0/7/130740625/5519034.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000594f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x594F 5864 bytes
SHA-256: 7750cc3cb34da7943c2304d6d07e59ebe6dcfe4ed4ed9f0817ee948cb48c6d8a
font_01_sfnt_off00006d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D36 11420 bytes
SHA-256: e6777c288301ee8761902baf3650a6aac58fda35e115dabc44b5884ebbdd1ba6

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