Malicious PDF — malware analysis report

Static analysis result for SHA-256 f996a6150908d5e2…

MALICIOUS

PDF

72.4 KB Created: 2021-09-18 15:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b8f197225456b471d7d86622129d72f7 SHA-1: 7b20635122b4db14f421ee6e50686ea9ad7c2687 SHA-256: f996a6150908d5e248b665bf5ce2740756303ef6b1f0e57d04a8bea122a34727
134 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains embedded JavaScript, indicating an attempt to execute code within the PDF viewer. The presence of numerous external URIs, many pointing to PDF files on different domains, suggests a link farm designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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://jordanadams.com/ckfinder/userfiles/files/42516131547.pdf In PDF document text
    • https://mgs-on-track.com/uploads/misc/files/1061390968.pdfIn PDF document text
    • http://grasslandtj.com/upload/files/todelulu.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/wewumegulojagikes.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/wafafegimubedarakefakow.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/mejukigoro.pdfIn PDF document text
    • http://bajkolandia-leszno.pl/userfiles/file/nigefitonifadiwuxep.pdfIn PDF document text
    • https://transturist.ba/ckeditor/ckfinder/files/files/83050136212.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/dafomigodadogepevete.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16136a439528c7---novikakuziveneduvoxe.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16137d1f7d9f48---pesokakuvivo.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/72251451074.pdfIn PDF document text
    • http://battlegrouponline.com/app/webroot/js/ckfinder/userfiles/files/18725189123.pdfIn PDF document text
    • http://hrdiborice.cz/erucom1/files/files/xareragetoguxoromalus.pdfIn PDF document text
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/93084453765.pdfIn PDF document text
    • https://pomacanthe-art.fr/imagebeforeafter/files/mapimapetines.pdfIn PDF document text
    • https://toscanafantastica.com/userfiles/file/83987131164.pdfIn PDF document text
    • https://inprovitcolombia.com/ckfinder/userfiles/files/bufiweju.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/kovevunimeridubozelasut.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/3159517774.pdfIn PDF document text
    • http://sintniklaas.kinderopvangpimpeloentje.be/ckfinder/userfiles/files/tozotunakugawidum.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/litetipelulito.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614385c58059f---doteminatobezodumufonan.pdfIn PDF document text
    • http://maychebiengoduykhuong.com/media/ftp/file/mogofawo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=operating+system+is+an+example+of+system+softwarePDF 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_off0000ba86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29D 11028 bytes
SHA-256: 93aeac7be8504153e8b0554d2ccdb68523d67ed6f427e5be7318ed5936c6301d
font_02_sfnt_off0000ec5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5C 15316 bytes
SHA-256: f87bdde5eaa1a2cbdb4768a884adc26b96af8a9c35f4f400e4c13680a11b8e24