Malicious PDF — malware analysis report

Static analysis result for SHA-256 624cc86078669d98…

MALICIOUS

PDF

75.1 KB Created: 2020-12-05 10:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4d3f6999cbab4f3f3658a8f45706c4be SHA-1: 3a092f8b7e79a20533697b9ac45dd0c096b6ea57 SHA-256: 624cc86078669d986a7cb4ffca0481c5a2ebb9cfb2680ce2c8daefe34d582107
196 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 and routes users through malicious redirector infrastructure. 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-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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://traffine.ru/123?utm_term=cool+cat+casino+bonus+codes+2016 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376380/normal_5f911c70ec864.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421630/normal_5fc7ba6f9676e.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/bagakaxiwafipu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf0d12dd96f5918b349a0/1606283473715/zf6_manual_transmission_fluid.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0abd72f8b574a0f52a3e/1606224574472/direct_variation_calculator_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feed2739-c40c-430a-8e17-d3e43919c856/management_accounting_solution_manua.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90e7bdaf-7a9a-4560-aecd-ced7000339f7/78624272556.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3d0518e72e5fdba2ef23/1606302982780/scorpio_sagittarius_cusp_dates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b7b7073-168f-4e16-8c52-52f84a70aa8f/dapiwuvebifolevikarod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a60c69b-c405-4ab8-a690-e8700a603675/sarepud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/103c338d-1127-4275-b588-5ff3c8fac7d7/34973221562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e704303-f93d-47d9-be8b-b6330845d571/pafedej.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD310 5360 bytes
SHA-256: 254944d89870d8f195397b7e547ebba9bbd4842fc5054320bec546a3394776e5
font_01_sfnt_off0000e550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE550 14392 bytes
SHA-256: 9ad352936a8f1e3e170ef154bc081db2fc508835b1af436bd9f97a13fa797f7e
font_02_sfnt_off000111a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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