Malicious PDF — malware analysis report

Static analysis result for SHA-256 741f6e53ab20b062…

MALICIOUS

PDF

79.1 KB Created: 2021-03-24 21:09:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dbd1251751d2a736b996967750101be3 SHA-1: 9f4cb7debc459fc50fa3eeae0252465bb38f1b79 SHA-256: 741f6e53ab20b062830252749445afca09b568fbcf4df8694039ebecd03167d8
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 0.9996

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/wix?keyword=anahuac+middle+school+anahuac+tx+77514 PDF link annotation
    • https://wefogazasu.weebly.com/uploads/1/3/4/8/134880183/220095eeb3a8ad.pdfIn PDF document text
    • https://bekajujoxofutit.weebly.com/uploads/1/3/1/4/131406668/vadexuxobusama_kanuremifef_bevutuwulejose.pdfIn PDF document text
    • http://werojati.getenjoyment.net/ruboneriruturep.pdfIn PDF document text
    • http://kusukeluwabe.mywebcommunity.org/sirifiked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401540/normal_602be24cc1cf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393361/normal_6055576598488.pdfIn PDF document text
    • https://surugatolezijef.weebly.com/uploads/1/3/4/6/134631687/984dd8e91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409998/normal_60525d06c7296.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/jhjSihj/zombie_shooter_pc_game_trainer_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488807/normal_5fff24cdab54a.pdfIn PDF document text
    • https://cdn.sqhk.co/bemoranoz/hmgf4dZ/25646826.pdfIn PDF document text
    • https://guvijubeb.weebly.com/uploads/1/3/5/3/135318684/9881221.pdfIn PDF document text
    • https://wogefusupe.weebly.com/uploads/1/3/0/7/130740138/5212418.pdfIn PDF document text
    • https://luroxonigin.weebly.com/uploads/1/3/1/4/131406321/kulabawem.pdfIn PDF document text
    • http://jerimujolegem.medianewsonline.com/97105124447.pdfIn PDF document text
    • https://cdn.sqhk.co/puwipaneke/Z9j3jja/color_picker_rgb_from_image.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369660/normal_5ffbc031f19bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/2020_and_2020_calendar_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/71927004102.pdfIn PDF document text
    • http://vejegaba.atwebpages.com/arduino_tutorials_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/xirodapebewazi.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/eskom_bursary_application_form_2019.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_off0000f31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31F 5484 bytes
SHA-256: dc1a01dd38337188d0c4cae521729237ebc87018fd6ce9e1a9a47f8f3caec734
font_01_sfnt_off000105bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BC 11480 bytes
SHA-256: 234baf99be73fb302ec91433409e53f5216d51cafac82c3080952eaddfb90f12

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