Malicious PDF — malware analysis report

Static analysis result for SHA-256 14db017c7488c7b7…

MALICIOUS

PDF

69.3 KB Created: 2021-09-27 15:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7df3943cd0033c0e10185392bc28e82c SHA-1: 4ea175603d995bad2512594573e15f668746eae0 SHA-256: 14db017c7488c7b7f83fda12deba878aaf9c2e4f449326bdd4bfb28a3de57b56
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The presence of embedded JavaScript and a high number of external URIs, many pointing to disposable hosting or compromised CMS uploads, strongly indicates malicious intent. The ML classifier and ClamAV detection further support this, flagging the PDF as malicious. The embedded JavaScript likely serves to execute malicious code or redirect the user to a phishing or exploit site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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 http://anipetkingdom.com/webroot/img/files/dojuminofadidubawalo.pdf In PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/sumar.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/91449031651.pdfIn PDF document text
    • http://kes.org/upload/editor/files/53570893600.pdfIn PDF document text
    • http://soc-in.com/data/media/files/61815229815.pdfIn PDF document text
    • http://sostrevalli.it/userfiles/files/sevew.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/wemolagipinedofegez.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/66349824536.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/fagiruwudulefuwi.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/ragazuzuleliwuraxezen.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/ubj1pnccmgnsh2q104em37vsk6/gakirupuz.pdfIn PDF document text
    • https://sportyou.fr/ckfinder/userfiles/files/66981024406.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/lewux.pdfIn PDF document text
    • https://prestinieurope.com/userfiles/files/27117075813.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/fe3c7b2cdd78fc58cee2c16553e7af89/fuzasofonukimitojapal.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/fa3d629d3832d7c38bbdbff21cb83470/rulonupor.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/40110671555.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/73559690457.pdfIn PDF document text
    • http://chayka-svg.ru/files/fufefakukotabumiwozu.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/78812369258.pdfIn PDF document text
    • http://48bulls.com/js/upload/files/88082535947.pdfIn PDF document text
    • http://familie-schiecke.de/images/file/33715686998.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021091317421473499.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e1290b24c9---sejabodonubivag.pdfIn PDF document text
    • https://selispin.net/calisma2/files/uploads/gakelotozudifekovam.pdfIn PDF document text
    • http://abwbaltimore.com/uploads/files/tizesawuvipoletagor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=k+rally+3d+android+downloadPDF 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_off0000b0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0BE 15432 bytes
SHA-256: 7724f04b1ef3bf689a4f55e2d5a5a046a253b5cad3b41b99171365856a99e568
font_01_sfnt_off0000d845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD845 10204 bytes
SHA-256: 6e638c4247841c966d18810d56351671a5e78152e31f362132f3be3c25b4a1c3
font_02_sfnt_off0000ef40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1