Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee47066b3b70b024…

MALICIOUS

PDF

85.7 KB Created: 2021-07-07 17:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6d92d76ed384b9ae841a3acd3964e433 SHA-1: 8e38fd1e9c50997eaec2ca037c350a38ccdaf809 SHA-256: ee47066b3b70b0246d11813552b53ec4de97f8bc47703e5e510a78bab91d255e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. The PDF also functions as a link farm, directing users to multiple external URLs hosted on compromised websites, likely to facilitate phishing or malware downloads. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/h7jitp0li30bkgnqe4brgcfsc1/67105318212.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/3ea2a071697e19d734cf059bd246c5e7/74792740091.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/2fed5e761cc254f6c9dcd4e12aba1c96/pananaxapaw.pdf
    • http://clarksville.net/wysiwygfiles/file/votabozimiwis.pdf
    • https://ystechpro.com/nbloom/fckuploads/file/83539914530.pdf
    • http://premium-h.info/files/files/pomunibumoxirufoxomu.pdf
    • http://goldmustang.ru/files/files/velalesufapiganosabiz.pdf
    • http://48bulls.com/js/upload/files/3525839002.pdf
    • http://alnoorcity.com/userfiles/file/92255771232.pdf
    • http://ampletrekking.com/userfiles/file/fekelejiwofatafufajaf.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/aepivkvts45o5367462sp2b8ov/supoz.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/9e35b3cbdf3f63622ac4648d3b226f58/betoriniromajuve.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16093a45161352---33021053156.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16087cc368e4d2---wogiduxizopazokow.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d2061eda546a888dc63c8a621f979edb/25743029337.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ccb1833d77---fabewuzibutuvikosikuzozu.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/i4jha4hsf91g1mlo6j909g8jdr/66110261867.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/e485a02f903172b7bbb05624e33c1b71/gedul.pdf
    • http://abacusnancy.com/userfiles/file/53404443447.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/0a22f0588332fc0602cd46899067f17f/59741476428.pdf
    • http://namuvaldymas.lt/userfiles/file/xaruxexazuxibix.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/6678d77f7ae5fb247351c28064bd5714/togixodobapudasovedujeli.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec786269ad---90891591282.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=active+directory+pdf+download
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e93d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE93D 16792 bytes
font_01_sfnt_off0001014f.bin
13d04303d2636c51d1a24e7044a56fb1bf1726c7a71fffc8c1ff8264727e762b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1014F 17908 bytes
font_02_sfnt_off000130c3.bin
c914fa64a4900b09dc0ade039e69a109c5e734c4195dbab905611af0a8aa3c54
pdf-font-stream PDF embedded font (sfnt) at offset 0x130C3 10692 bytes