Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e5c8fe334d01f28…

MALICIOUS

PDF

87.0 KB Created: 2021-04-25 20:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ff7c35e9673fc4be4516d5353fe044d7 SHA-1: 55b8fe2a5aa795f8e9b1027d48ecd5f074711fb3 SHA-256: 6e5c8fe334d01f28fd6f4f9d5552099da8c7cbaa9bb223a61dcd9b6abab1d609
126 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 0.9996

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://bologen.ru/strik?utm_term=harvesting+hope+the+story+of+cesar+chavez+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387711/normal_601754a60d682.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411490/normal_5fe8b1cbe52b9.pdfIn PDF document text
    • https://fizilotot.weebly.com/uploads/1/3/6/0/136050642/mulumowugusekuvepone.pdfIn PDF document text
    • https://cdn.sqhk.co/wigetoxeveka/fdIVjbr/project_management_software_for_small_business_uk.pdfIn PDF document text
    • http://zdorovienashevse.xyz/how_to_make_fertilizer_using_food_wastenxe09.pdfIn PDF document text
    • https://pefiritiz.weebly.com/uploads/1/3/1/4/131453982/7025843f54ad.pdfIn PDF document text
    • http://trokot-online.xyz/bengali_horror_books_free_downloads4wg0.pdfIn PDF document text
    • https://dobabolomibela.weebly.com/uploads/1/3/2/6/132681713/9bf193f.pdfIn PDF document text
    • http://vodoroding.info/what_did_leta_lestrange_do_to_grindelwaldyxsvm.pdfIn PDF document text
    • https://dixozetazexode.weebly.com/uploads/1/3/4/4/134472526/samin.pdfIn PDF document text
    • https://cdn.sqhk.co/vizelupavew/pjdgdgg/ironmaster_step_bench_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450244/normal_60044a6c9b5fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451228/normal_5fe2998e97728.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451225/normal_5fc8638bce540.pdfIn PDF document text
    • http://domavera.ru/halo_wars_game_download_full_versionak0t3.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/jgdYgjs/sound_equalizer_ios_13.pdfIn PDF document text
    • https://cdn.sqhk.co/pemenodisoda/YoQhipa/pawubipibadokaboxabowes.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxaguzifep/chjdJf7/ninja_foodi_grill_pro_reviews.pdfIn PDF document text
    • http://nesobaka9.xyz/resume_format_for_mba_freshersdc6ll.pdfIn PDF document text
    • http://return-0.com/52054802332u6ybu.pdfIn PDF document text
    • http://parhelifrl.space/zikogagosamupegozisepepjpv8.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
    • 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_off000102f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F3 5452 bytes
SHA-256: 67c5dbafc96b8b69e70b5a07acf1a5478b2dd6100ef7eb43b6492904877b6f9a
font_01_sfnt_off0001156a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156A 13208 bytes
SHA-256: 57038759600e4c28d41f6f3d6568cfe6805d79a6463749b9973c8739646e7547
font_02_sfnt_off00013fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCD 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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