Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b24a3ca308abb9d…

MALICIOUS

PDF

70.1 KB Created: 2021-03-16 23:56:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 33755413d471213c3b2cfc6e6daef231 SHA-1: 8db0a61cb990d26f1efb84198ff86323aa459171 SHA-256: 6b24a3ca308abb9db9028df85aeb27f88976107754808e6598f048bed5b9df09
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 0.9998

Heuristics 5

  • 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.
  • 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://soxebez.ru/123?utm_term=lagu+barrett+crake PDF link annotation
    • https://guvufusefek.weebly.com/uploads/1/3/1/0/131070011/183b0ec.pdfIn PDF document text
    • https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/memetik_lotafovufax_daneketa.pdfIn PDF document text
    • https://dikajumexuw.weebly.com/uploads/1/3/4/3/134324924/8ae1f9627fbcc90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_74513a65f7974ab09df712116d6e7f86.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1d3aebe-083e-41fc-b3a3-59fc30022271/74875116875.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/cyberpunk_2077_delayed_again_2021.pdfIn PDF document text
    • https://df1882fa-13c5-42f1-8438-577935b594b9.filesusr.com/ugd/91932b_ed0b385740994af79dabfef0f7ca2627.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2047dce2-b022-4af5-9651-6b97c87213f2/how_to_start_homelite_2600_psi_pressure_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/tewadilaluzofodi.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/87450006755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b43c3ed1-5d9b-40cc-8c61-92a42fde970e/90231512677.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/carls_sims_4_cheats_guide.pdfIn PDF document text
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_71fbe5fa5ad04d209b0ba7894dc96a29.pdf?index=trueIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_e5249c79fbf047b295ae95557f86d0f1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muxegeza/tedom.pdfIn PDF document text
    • https://fa3f2985-242d-4a4c-93c0-6adbfb259eaf.filesusr.com/ugd/8dbe7a_3d3a258cb07d441fb5ca6fd2c9db2b6d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gedexim/math_exercise_form_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57806ca6-5e4b-4b74-999d-a0ab6fa8affd/dan_brown_books.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_off0000c86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC86C 3556 bytes
SHA-256: 273b015e2ca4c80db8f7c342acccf43b2f791221272078805ad41f9ff457bbe2
font_01_sfnt_off0000d4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EC 4904 bytes
SHA-256: 482c7332c4f21a7522a57610acb05167c38df41dbf1b7800801dd8b5638135b9
font_02_sfnt_off0000e5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B4 10588 bytes
SHA-256: c45582bad9ebb24642c0ace7ed3038cb6b919023ed4dbb262356973b1a433386

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