Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6a49abdd85b7a0…

MALICIOUS

PDF

78.1 KB Created: 2021-03-03 20:26:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: befad98b648992a42ba6f597c5e64bcf SHA-1: 83a496eed1e3662518004ab0a00e556a135f0400 SHA-256: 6d6a49abdd85b7a01c7967f255341186ab10d02b98c6a1d744ede4e90ef54021
66 Risk Score

Malware Insights

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

The PDF document uses a lure related to ISO 27001 certification to encourage users to click on embedded links. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is part of a link farm hosted on disposable domains, suggesting a phishing or malicious redirection attempt. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://pelibifir.ru/strik?utm_term=how+long+does+it+take+to+become+iso+27001+certified PDF link annotation
    • https://cdn.sqhk.co/kisesawaropo/99bhhjc/xobajafunoroxi.pdfIn PDF document text
    • http://groshyk.site/read_lethal_whitetwau1.pdfIn PDF document text
    • https://cdn.sqhk.co/doginifa/PghnAig/red_balloon_company_hythe.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/VhbTHRj/batonilugeri.pdfIn PDF document text
    • http://fitness1.space/cube_world_cheats7diu7.pdfIn PDF document text
    • https://penizamuravepu.weebly.com/uploads/1/3/5/9/135976181/06fec89d4c19.pdfIn PDF document text
    • http://itchia.space/xenaxbvbtr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vajavugozuw.epizy.com/18106750277.pdfIn PDF document text
    • http://kozawagoborav.rf.gd/62292901961.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/77895766246.pdfIn PDF document text
    • http://ribizotujigotok.rf.gd/bushido_tattoo_book.pdfIn PDF document text
    • http://rusesav.rf.gd/best_adblock_for_android_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/itk_affine_transform_parameters.pdfIn PDF document text
    • http://xepododulujex.epizy.com/62382616915.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/piridotixeluwa.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/prince_george_s_county_court_forms.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_off0000f3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AC 6004 bytes
SHA-256: c438c160871bff17a25a6de24cc5e6f5d7266b4b2303a24af4e83b28f9d4588e
font_01_sfnt_off0001082b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082B 10212 bytes
SHA-256: 86003d6f6d4584bec3366f1135ea7962c456afbc0a0493014f8fe89320c07f67

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