Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d51a68fd83b97fe…

MALICIOUS

PDF

85.9 KB Created: 2021-03-19 05:50:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 092d26fd983bd0095ed6edc64e9f1b51 SHA-1: 56e7bdb9116521048645d45cb87b1655cb307f17 SHA-256: 3d51a68fd83b97fea1b5e93c565f8346df167313332712b7475b29fb382affae
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://dafemum.ru/123?utm_term=avatar+movie++dual+audio+300mb PDF link annotation
    • http://dezimazokuxulil.mygamesonline.org/anionic_polymerization_principles_and_practical_applications.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376612/normal_6017a6797788a.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/46980516965.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/23700439557.pdfIn PDF document text
    • https://cdn.sqhk.co/regisanozoxo/i4cjh9R/jogo_catch_the_candy_halloween.pdfIn PDF document text
    • http://lovefoxesi.iblogger.org/example_cobol_program_to_generate_a_report.pdfIn PDF document text
    • http://iranomics.com/267610825234kq8c.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebililofo/jK9zkhg/tip_tap_soccer_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479446/normal_601c9b9acabd3.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/igjjME0/67393813542.pdfIn PDF document text
    • https://cdn.sqhk.co/gavonenegave/gjjMhdV/zozenafufese.pdfIn PDF document text
    • http://limons.space/68708333875sj8m5.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/e8f9ea18-c9da-4e4d-b0b4-5b218031d164/29198699087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc5c6f1d-c6a4-4e0a-8c33-6d84ec06c115/25190771703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca6a4348-7096-46fe-81d4-1ac053cd8efd/what_number_after_3_when_the_knight_falls.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfdc1167-fce1-454a-8ee4-8f1cbe2f915e/37931555917.pdfIn PDF document text
    • http://sabuxixu.epizy.com/hymnal_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a52457c2-08cb-439f-bf51-b20291bf2d6a/vepozifime.pdfIn PDF document text
    • http://tutazena.epizy.com/lozuwudubexapotufinib.pdfIn PDF document text
    • http://jafimelivif.rf.gd/como_se_dice_la_culpa_es_de_la_vaca_en_ingles.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FB 5288 bytes
SHA-256: 654fb67a5512213d7b22cbf9c93cf78f2362b10249d61e16e62abaf8d8966a67
font_01_sfnt_off00010ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE4 11824 bytes
SHA-256: 321516a3d1046bf8f8cd203c9510e38a14e1b824a5f99424c3497e487bda8524
font_02_sfnt_off00013324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13324 16232 bytes
SHA-256: 1d4ebd634e9a4b1afc3ba2e660f7abdbad7ecfb3c20c2fb0daf688bec4f9a1d5

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