Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d57be572d8b7383…

MALICIOUS

PDF

79.1 KB Created: 2021-03-20 18:10:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bba26dde17dd7a85d041c5f016702eaa SHA-1: 94c43e2119826b069aed2200d14127422ea44e2f SHA-256: 2d57be572d8b738384033c3982b1ceae3184c2f2d76dbe9f6b0677caeff82b04
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/123?utm_term=apple+to+my+pie+song PDF link annotation
    • http://tagaporigowekis.mygamesonline.org/76845911215.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487197/normal_60004692ec3fb.pdfIn PDF document text
    • http://zugasanuko.getenjoyment.net/dotigofukewetenibisuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411219/normal_5fe6621fc772c.pdfIn PDF document text
    • http://penageli.getenjoyment.net/87657509924.pdfIn PDF document text
    • https://kixivoveluvib.weebly.com/uploads/1/3/0/7/130775150/zafezezawanus.pdfIn PDF document text
    • http://jugepawe.medianewsonline.com/dispositivos_de_procesamiento_para_una_computadora.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/schwinn_exercise_bike_270.pdfIn PDF document text
    • https://murasujudadalox.weebly.com/uploads/1/3/5/3/135338307/laluka.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/26769362345.pdfIn PDF document text
    • http://kitukotobov.medianewsonline.com/jixabijuje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458148/normal_6020a52dea17e.pdfIn PDF document text
    • http://zitarekatinupas.sportsontheweb.net/48541013950.pdfIn PDF document text
    • https://boziwukajolefix.weebly.com/uploads/1/3/2/7/132711983/2084723.pdfIn PDF document text
    • https://tererenigi.weebly.com/uploads/1/3/1/4/131405956/navajezigoberoguga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://velelakolifuvu.onlinewebshop.net/vudazas.pdfIn PDF document text
    • http://jifimurosesapu.atwebpages.com/66972970742.pdfIn PDF document text
    • https://ce419959-236d-4487-89d7-67f356bda573.filesusr.com/ugd/147b51_b3ef7e878ef74ad888814ddb6a3e4eb8.pdf?index=trueIn PDF document text
    • http://muluwokixo.onlinewebshop.net/aldehydes_and_ketones_multiple_choice_questions.pdfIn PDF document text
    • https://d2d87fd5-5f4d-49aa-ab3c-2263ce4b5d22.filesusr.com/ugd/9169d2_bb1f73f23b1f4c8ca983ec8ecd8c1a15.pdf?index=trueIn PDF document text
    • http://wudemexa.myartsonline.com/tuxasuvetufanigirok.pdfIn PDF document text
    • https://3edbbcf3-b5b1-446e-9630-835d38fa79e0.filesusr.com/ugd/6908d7_4b2a2ad337994bd2baf2253b6bde9650.pdf?index=trueIn PDF document text
    • https://cdfb6f36-dde2-4af5-b3b7-55ff39976061.filesusr.com/ugd/c6ac46_86dd20ffb9034111b1b0d608dceacb31.pdf?index=trueIn 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_off0000f862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF862 4924 bytes
SHA-256: 12c19d0b9dd2930b5d98e3343a7c7b6e50460761d7af11492941bdfbc66633e8
font_01_sfnt_off0001092a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092A 10616 bytes
SHA-256: 9970c50b4d964cd5f63b30edc12f587635025e4be05a6a7b10fd6ba21fd7eed0

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