Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd032410be88c5f…

MALICIOUS

PDF

70.2 KB Created: 2021-03-13 22:16:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1d1a5bac4741745d5ea546f8ad077425 SHA-1: 5a7bbcb3e300ab8a377e9b68fd807efeff317f0b SHA-256: cdd032410be88c5f6f15282963a9a1eb18505649a617d8964b81373a2f2eaba5
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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=evolucion+del+elefante+y+sus+caracteristicas PDF link annotation
    • http://xejopegig.mypressonline.com/best_deals_on_roomba_vacuums_black_friday.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449422/normal_603f548d226d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424645/normal_603b331b33bc3.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/airtel_dish_tv_toll_free_number_customer_care.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366964/normal_6006b12396747.pdfIn PDF document text
    • http://kudikadip.getenjoyment.net/xitap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_28600246932040c08e79b497d7bf2276.pdf?index=trueIn PDF document text
    • https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_410c987207d944759c5bf77548508ce1.pdf?index=trueIn PDF document text
    • http://wegugoleta.onlinewebshop.net/breadboard_projects_for_beginners.pdfIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_728f67e13e3c4b3c817723af2ec69cf0.pdf?index=trueIn PDF document text
    • http://kuzemepusiloj.onlinewebshop.net/86177545673.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/tamil_guide_10th_free.pdfIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_352f7be6f1304f1ea2a0c0f7e0f3aadb.pdf?index=trueIn PDF document text
    • http://zisukuvi.atwebpages.com/how_do_you_write_a_thesis_statement_in_apa_format.pdfIn PDF document text
    • https://e6c529cc-411f-4195-b5ea-7b5fd081490a.filesusr.com/ugd/b7ab08_f1c119536af544e88b9a4d2d91407200.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/76236427952.pdfIn PDF document text
    • https://8994dc82-3839-475c-8de5-8afaa5c13229.filesusr.com/ugd/798b5e_71b808ba89b6400e85ea12b72f29b704.pdf?index=trueIn PDF document text
    • http://sivikonalijuto.myartsonline.com/bsa_firemn_chit_requirements.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_off0000d420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD420 5132 bytes
SHA-256: 7f270ca395ea1c8ad13fbecbb6ffff49ce43efc019cef6d41dc9a5de890f333d
font_01_sfnt_off0000e5be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BE 11596 bytes
SHA-256: b8bec18bfa8e0278725db10fcf033170ea5e5f3feb0240e559b3937d60f93518

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