Malicious PDF — malware analysis report

Static analysis result for SHA-256 66eb76e20363fe8f…

MALICIOUS

PDF

86.7 KB Created: 2021-04-18 05:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65fb2bebf7844253efb440725b7fb337 SHA-1: 7d6f1a8f6f3924ddcf2c2a03de9447664ae7fbd5 SHA-256: 66eb76e20363fe8f3403417895428ea995bf61fe1825989b30938ff58f6e7fdd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm configuration. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=forgotten+realms+ruins+of+myth+drannor+pdf
    • http://apparently-home.com/ios_13_for_iphone_680mcy.pdf
    • http://lg-copyrightforms.com/kosedatnuyf0.pdf
    • http://clubstore.info/wheel_action_driverskeras.pdf
    • http://nekretnine.site/49201436883o7jrf.pdf
    • https://cdn-cms.f-static.net/uploads/4446914/normal_60479457c4c3e.pdf
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/tefonafi.pdf
    • http://fragcups.com/accounting_chapter_14_study_guide_answersjy6za.pdf
    • https://static.s123-cdn-static.com/uploads/4421782/normal_5fc79e3188123.pdf
    • https://cdn-cms.f-static.net/uploads/4366335/normal_600f8efc5ffa0.pdf
    • http://biomanua.website/balochi_remix_song0zgjk.pdf
    • https://static.s123-cdn-static.com/uploads/4403118/normal_5fc87a5602267.pdf
    • http://ighelpcenter.xyz/convert_ipynb_to_colab2bppb.pdf
    • http://subfamjtii.site/books_like_the_knight_in_rusty_armorloikm.pdf
    • https://cdn-cms.f-static.net/uploads/4448735/normal_60334ba337fd5.pdf
    • http://bufo.online/vipezomocfr.pdf
    • https://zikavudosun.weebly.com/uploads/1/3/4/3/134329779/9975433.pdf
    • https://tojoniwov.weebly.com/uploads/1/3/4/6/134602819/9254793.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/38e4a4a7-5757-4f64-86be-be651c7c2e7b/95868628796.pdf
    • https://uploads.strikinglycdn.com/files/18cad7c0-4988-4099-9cb9-811de57c14cb/95875590640.pdf
    • https://uploads.strikinglycdn.com/files/3ed442b3-2390-493f-bba1-f97e20211c37/noble_efreeti_5e.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011456.bin
50c9ca81ce0e4f0fa0bdc86fdbb23d6dc332c8df5ee530cc9db7259032ca56b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11456 5512 bytes
font_01_sfnt_off000126f8.bin
ac103a3f4e31796b0a2b81c324b0882dc67b189e3a9148c9f3e648fd5174a112		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126F8 11232 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.