Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea9e7b6f6e7026f5…

MALICIOUS

PDF

85.3 KB Created: 2021-08-15 03:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b4fde3fe30ba5bee22e02bb8be129fae SHA-1: 0612db10cf47e74d1d48a1fd7a4d64502140dc2d SHA-256: ea9e7b6f6e7026f57c9aa244e9955cbb4f4eae6c3cd7c435047dd05fbfe866f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites acting as link farms. These farms redirect to other PDF files, indicating a multi-stage lure or download mechanism. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160acf4db890d8---99744075096.pdf In PDF document text
    • http://asustainable.com/global/file/nuwunu.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160b31402e2be0---84351851688.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/xavetilutinimije.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/812f97fa5eb864b8441664087bb3c18b/zevevasebijarim.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/3e4d2b7531b628325c2b7455bb15a8a0/savemizeluroz.pdfIn PDF document text
    • https://www.puskinas.lt/ckfinder/userfiles/files/devomaxalur.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/wuwimafutikolivugu.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16074892b4ec99---61080573259.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/jefukugugitizibana.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/n7m424q9gvn5non7q71artqmmu/91536557727.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/h4v0uct4f6bcn7pr710ltp037e/rugufovelatawulamurora.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/ke59d9idbchbhj3i6i9dgbflfu/93629708936.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/satag.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160acfd42d8371---94283250926.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b17b0755893---dobanaxivawosovik.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/40f4f8af30425dfeaf58708d09f52dcc/14876836345.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/138478447560a9826e99ed6.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/r2vmr2aoccdhejjb9o4intnbj1/sixiruviligalumu.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/4e7c2c37aef162a73e810dc42b9f6ff2/gijenobonifadiduwuvazibi.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/070759453961.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/e53b1c08312ec61de74dd9314d8b643c/mitukotiletoratunivo.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/13612033036.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=o+poder+vs+a+for%C3%A7a+pdf+gr%C3%A1tisPDF link annotation
    • https://rt9.rspo.org/ckfinder/userfiles/files/vewutusotewi.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://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_off0000e3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BF 19640 bytes
SHA-256: 6f3e85ebeda0b55542560df5a3e41b74db79d442e2e383243a26776a2b412c62
font_01_sfnt_off0001143f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1143F 10992 bytes
SHA-256: e411433350d3696bac8b62cdcec2fb8374fb55100207f7ef0d1e98f830a46007
font_02_sfnt_off00012d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1