Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad75903dbf5e570b…

MALICIOUS

PDF

108.0 KB Created: 2021-08-14 01:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3090b4569ea90529351dfdc430df440b SHA-1: e1edc4f1b426389ca5bbd09abf81bfdf01460657 SHA-256: ad75903dbf5e570b4e23a5bd832c31bc8ec2dd14754fce424e01d826f855d6e1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites acting as a link farm. This suggests the PDF is designed to lure users to malicious content, likely for phishing or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/8de193a62465a78a4a0eca3f3b5032cd/xazubolajagu.pdf In PDF document text
    • http://beerskiboot.de/img/upload/file/fuxetabolugiwu.pdfIn PDF document text
    • https://hanul-muresenilor.com/wp-content/plugins/super-forms/uploads/php/files/238hctom0j60ur6diip905p6nq/49315421551.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/49db9af24bf9ed1d0448cf223e76a597/23623882245.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160aa048b1a202---ripafa.pdfIn PDF document text
    • http://nationalcoopadvisors.com/userfiles/files/joxeniwitefevelunoweli.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/b10a34a1b00b7a2b5c4835efc6d5a560/31290116644.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bde7e56a7---81987179113.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/91041234645.pdfIn PDF document text
    • http://allasclub.com/campannas/file/47428461103.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/fiwibezozuxafakubulezi.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079785f4b25f---88412123553.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/5453262842.pdfIn PDF document text
    • http://tragiaocolamsapa.com/userfiles/image/file/69276716329.pdfIn PDF document text
    • http://lctrading-gmbh.com/ckfinder/userfiles/files/wesivuzisemufopuzasiwaj.pdfIn PDF document text
    • https://waelfawzy.com/userfiles/file/In PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/dolofuxisunisiditulaxas.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081371e1d912---lixemokuvi.pdfIn PDF document text
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/kiviwapuzuraj.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/12221905545.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a422ac94c---vuzitejaxa.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/fofagasemebesupojamule.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=vector+word+problems+worksheet+with+answers+pdfPDF 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_off00012de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE1 24736 bytes
SHA-256: fae3c45d47ac52adec4792894a7dd5a1354e364e14a7ac9b9d13451acf3d8fed
font_01_sfnt_off00016d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D26 11172 bytes
SHA-256: 2a1c2bcc205818305759d87abd0420f492794a4c82925c732388cef27d702a89
font_02_sfnt_off000186e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.