Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece4fe72fc9da981…

MALICIOUS

PDF

73.7 KB Created: 2021-03-09 19:43:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 627c1efde3e51e138c9342b1e7d946bc SHA-1: f623983456915508adf34828603015a3cac68606 SHA-256: ece4fe72fc9da9817c04b9088c1815e8ba2d8b80e1acb689d7161b4519f90681
156 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 5

  • 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.
  • 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://ponafet.ru/aws?utm_term=attack+on+titan+anime+end+in+manga PDF link annotation
    • http://raxawevamavox.getenjoyment.net/zosogarovigetazanisimusag.pdfIn PDF document text
    • https://filojekejo.weebly.com/uploads/1/3/4/4/134446685/temejif.pdfIn PDF document text
    • http://zozamowewideno.mypressonline.com/what_is_the_plot_of_midnight_sun.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/vinijebiko.pdfIn PDF document text
    • https://xusopulude.weebly.com/uploads/1/3/1/0/131070786/pukuvimulaxu.pdfIn PDF document text
    • https://xazefobilizap.weebly.com/uploads/1/3/1/3/131384081/kuremupe.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/is_cyberpunk_2077_exclusive_to_xbox.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/everstart_smart_charger_codes_888.pdfIn PDF document text
    • https://kurakozizuvev.weebly.com/uploads/1/3/2/6/132681999/0d721de26cf4437.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/99706494291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cff607f-6654-436f-953d-73a828f243fd/muligigiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a32d390-367e-4df7-9f7e-7bdb789d8f07/nonviolent_communication_a_language_of_life.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/job_registration_form_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/pafitoxatid.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/a4_size_catalog_templates_psd_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eb782fd-0cef-4df4-b0f4-01191d8f31ee/dovuzejojazovar.pdfIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/which_garmin_handheld_gps_is_best.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/98456856466.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/conjunctions_worksheet_6th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/how_do_white_hairs_appear.pdfIn PDF document text
    • http://duziroro.myartsonline.com/linux_study_material_for_beginners.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_off0000e370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE370 5008 bytes
SHA-256: b18492ae2113fc5c2f732b33c7bf428f11042ea1dee7981cc0b2bf14abd09618
font_01_sfnt_off0000f46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46F 10956 bytes
SHA-256: 3937b368dfe28e3965bab562df69ef51c00d7e6412d5ef9e1646bc21b8b27f0e

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