Malicious PDF — malware analysis report

Static analysis result for SHA-256 826eba8f1d7f94a9…

MALICIOUS

PDF

77.9 KB Created: 2021-03-04 21:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5d7d542501b88dffb9e4cedd5ce5f632 SHA-1: 7b13e668fa288f2aecd33641f0560395fe249b4a SHA-256: 826eba8f1d7f94a98f563d77e8df08262db978e86e8b535c25e51c82adc0854e
186 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 ClamAV and 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 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/award?keyword=juggernaut+method+2.0+spreadsheet PDF link annotation
    • http://teenagetutor.net/ejemplo_de_foda_escolarj6ggt.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/chghjia/shopping_list_my_list_app.pdfIn PDF document text
    • https://rixukiwifezi.weebly.com/uploads/1/3/5/3/135392959/3a50372f00f7.pdfIn PDF document text
    • https://togezajotutev.weebly.com/uploads/1/3/0/8/130874352/sarosi.pdfIn PDF document text
    • http://idealslimitalia-official.site/tela_tergal_caracteristicas_de_unby5ec.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/65334683760.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/eEggb8C/skater_boy_fashion.pdfIn PDF document text
    • https://cdn.sqhk.co/rapigufagi/jKiaYje/74365129318.pdfIn PDF document text
    • https://saniluje.weebly.com/uploads/1/3/4/3/134323688/vifexokalewugulowep.pdfIn PDF document text
    • http://sunazeremitiwu.mypressonline.com/how_to_put_bobbin_case_back_in_singer.pdfIn PDF document text
    • https://cdn.sqhk.co/zonakagud/hajeTdD/8385651168.pdfIn PDF document text
    • https://cdn.sqhk.co/kagixepo/Ahcedgj/sorupolud.pdfIn PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/8c8b1e0c45.pdfIn PDF document text
    • http://cocobeautybar.ca/viwajubezikuvuwukoguzilidnu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa4d8e83-7ba3-4b76-93a5-d9fc3d48e9a8/ejemplos_de_las_funciones_logicas_en_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e15aff0-3a56-463d-9aad-99381a5bb822/gress_root_word_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e9e40ab-dd23-4690-b74a-98a683cf1a16/xiwetima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a3e33ae-3c98-4fc8-87a1-4413e16e5fc9/types_of_brainstorming_in_reading_and_writing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b1aab3e-53c0-4d34-b7f2-0d7122cb6b1d/how_much_does_it_cost_to_run_a_delonghi_oil_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cad38d7c-5ed0-4860-8943-1ed9b63f176c/83557973684.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_off0000f492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF492 5636 bytes
SHA-256: aeacd3f9bdf36ac82d89feee2bc8c32239c6aba76d9d32f8b73b130b5e5b71c1
font_01_sfnt_off00010795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10795 10264 bytes
SHA-256: ce26f3dfd3087d1f53b1eb19b99a041dd9063cb378d923c3d4d4caebdfd475a9

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