Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14d0006a514bfe2…

MALICIOUS

PDF

71.4 KB Created: 2021-10-01 09:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 21f436f675c7b28a245a145bc11d8c44 SHA-1: c951931e7cd704b4c9389c5f0192c74e4fc6c816 SHA-256: e14d0006a514bfe276a3072e5f14578867ce4a792475f014ae94c38a286e559d
164 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan. It contains embedded JavaScript and numerous external links, some pointing to compromised WordPress sites and disposable hosting. The presence of JavaScript suggests an attempt to execute malicious code or redirect the user, aligning with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • 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://elesud.it/img_pagine/file/53099691304.pdf In PDF document text
    • https://gianlucabruno.it/dati/upload/file/zenirewurugixubapixerex.pdfIn PDF document text
    • https://hssanesteban.cl/files/86661265813.pdfIn PDF document text
    • https://chachachat.info/js/ckfinder/userfiles/files/5142239188.pdfIn PDF document text
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/xefewefedudawedume.pdfIn PDF document text
    • http://balatonfurediallatorvos.hu/userfiles/file/xunubozomufogufuwaxibudo.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/juvarukejepikax.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/muzukipugebeveli.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/hr73t5dt2ouph3ge0sbjf6h742/filafowopekofovatoke.pdfIn PDF document text
    • https://thegioibaobicarton.com/Images_upload/files/lixugofuzokivut.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/9383f67cc73043320a469f12ab854f4f/64338818946.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/99131755195.pdfIn PDF document text
    • https://weboonline.com/ckfinder/userfiles/files/74586021845.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/jipufupizabamuwaluj.pdfIn PDF document text
    • http://interroadholland.nl/userfiles/file/73827744895.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/mimijavogewukesut.pdfIn PDF document text
    • http://cmcthailand.com/ckfinder/userfiles/files/fixuletogo.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/godabofiloxeji.pdfIn PDF document text
    • https://creativenursery.net/home/creative/public_html/ckfinder/userfiles/files/ximapebafazunazugike.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/0493b9d676c48eea3f18e2f62493bbce/60804760964.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/45443619722.pdfIn PDF document text
    • http://kanomax-nsk.ru/images/fudemowabafexifisoperazar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=gifty+free+gift+cards+apkPDF 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_off0000b1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1AB 10772 bytes
SHA-256: 31e75f793c6048d22fb9e53f14ab00a871d233e8f85d86e3ea5d9a5205128aa9
font_01_sfnt_off0000ca76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA76 17940 bytes
SHA-256: efa58b37f04822a83c9b47fffed45f1db34895db57c12ec1b669d3bbc0843add
font_02_sfnt_off0000f86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1