Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e220261843a44b8…

MALICIOUS

PDF

83.3 KB Created: 2021-06-28 23:34:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 96ee994dd045d1e0efa6bd106dc4068c SHA-1: 3fb03bbb2c4dcf1b1fb9db5787d3e818309212ba SHA-256: 2e220261843a44b869b46afc290b55cbca71d7b3f24f12536291122953663528
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of multiple links pointing to compromised WordPress upload directories suggests a link farm designed to distribute further malware or host phishing content. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d200fb6661---xopififimodetogezomo.pdf In PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/befuzexewolesagif.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/70kscrllu9ps7f7934c39uicsentgdku/19229309860.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093cf0aa53d4---zonazexomujuku.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/b54963bf83305efe79ce8f75e145e283/30184288357.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/4144268390.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703a54a6818---18517310065.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079daacb8bb0---xegoga.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/8fca59ababb96a7bf7f65455768524ba/bivezexonawevokuwivoxe.pdfIn PDF document text
    • http://cosmickino.ru/sadm_files/lojazopov.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5587aa9d95---mejibizisofusomuzupodaw.pdfIn PDF document text
    • https://maisonforville.be/documents/file/zulovinaxedaxavafis.pdfIn PDF document text
    • http://bogieclassof67.com/clients/71235/File/favefa.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/77e1cd47d8925c544e319707862b8ca5/63791493461.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/4eac0812fbf2c645ffcd16f000b49bea/dakanofevetemujakor.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce5c4380de---dotegizagepewusamas.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/gubozimawezisugita.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e5f2b27bd---gizegoredorawono.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/sl9845os4rhtqkr2s6glf2hrc6/suzave.pdfIn PDF document text
    • https://actor-conseil.com/files/file/zitozosunubi.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/59844463887.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837d2b878c9---xilepusarovejozipa.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/7ea9c3d8704cf9304d67e1d1e2c0ec68/97855800473.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b96643440ec---71253934906.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/39896655999.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=example+sentence+of+information+disseminationPDF link annotation
    • 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://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_off0000dd13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD13 19412 bytes
SHA-256: 72108bfe08c9487c41d1293a8a1fdbb5f72c4ebe0ff81d976d6fc2e0eec1ed7a
font_01_sfnt_off00010e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5F 10868 bytes
SHA-256: 335fb0a8a781107cfe8ef7dab9f054de8cb0fae4b581e1152b249258a7b12eed
font_02_sfnt_off00012775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12775 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1