Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff861add36a6f36…

MALICIOUS

PDF

75.2 KB Created: 2021-02-20 07:02:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 23a246d4cba9cf80ed850bcc39b864ff SHA-1: 809e4a5874be4ec31c8d540fb4d423f439a82d03 SHA-256: 7ff861add36a6f36a144903ec8ca87539be6fc0f381a36c6c928766085776f6e
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://maypoin.ru/wix?keyword=energy+worksheet+physics PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426416/normal_5ffb59c88e942.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/HjeMxuK/rerafapegane.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368989/normal_5fe53d45a37cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502188/normal_5fedea951b3c8.pdfIn PDF document text
    • https://lokeduvedip.weebly.com/uploads/1/3/4/8/134885922/2539349.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/djiVjhV/wivosojajafimewupilomumib.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/ghggjiJ/35932076418.pdfIn PDF document text
    • https://jewadasin.weebly.com/uploads/1/3/4/6/134604584/ludox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449405/normal_5fe0f1a6924c9.pdfIn PDF document text
    • https://cdn.sqhk.co/tarudifirew/hdieAAM/xuxupasas.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/2xdfwhg/44303524768.pdfIn PDF document text
    • https://doxavigefixo.weebly.com/uploads/1/3/5/3/135391607/ramodel.pdfIn PDF document text
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/tabafapuxifon.pdfIn PDF document text
    • https://sepetumeba.weebly.com/uploads/1/3/4/6/134601334/3843624.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/fCfcjaz/lukifuvubekedafo.pdfIn PDF document text
    • http://fitukogamoj.iblogger.org/53961595566.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vabizawez.epizy.com/wopomolaginipibalizagug.pdfIn PDF document text
    • http://sagalesokalu.epizy.com/95992643156.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_off0000df16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF16 5168 bytes
SHA-256: 9f02b8a4b2ab9c7e33efdc2b185a339467252e27fd424cfb68b2afebef1f5319
font_01_sfnt_off0000f0cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CD 15188 bytes
SHA-256: f33317f8db0a2f0e45bee318a7185fc30f823773f7fc0b469bf22ae57024e0ed