Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d183d6fc891c527…

MALICIOUS

PDF

83.5 KB Created: 2021-09-18 09:15:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9288c462cf9ab658b3c28c5f0ab6831c SHA-1: f8456aff3c1bf435cd2538074f8e67b46aede9ca SHA-256: 5d183d6fc891c527d0da6bf995cf115c2aff2d2253674c953721a36d16161d45
134 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, a common technique for executing malicious actions within documents. The heuristic firings indicate the presence of JavaScript and external URIs, suggesting the document is designed to redirect users to potentially harmful websites. The ML classifier and ClamAV detection strongly support its malicious nature, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/bb28c4f8e4b9c7201ae80e5830e84681/legariwesotulur.pdf In PDF document text
    • http://architettogherardi.eu/userfiles/files/xukupesobiwebe.pdfIn PDF document text
    • http://lepetitjaunais.com/userfiles/file/tamakajugitujitutitabawog.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image/files/14871179909.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16142dfba5ab52---ralas.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/domigevozikaboriwolena.pdfIn PDF document text
    • http://kiapelhrimov.cz/UserFiles/File/movupebutiv.pdfIn PDF document text
    • http://ediliziaunoaventi.com/userfiles/files/11947164441.pdfIn PDF document text
    • https://garnet-medical.com/userfiles/files/48635078001.pdfIn PDF document text
    • https://giasidaily.com/uploads/userfiles/file/25429462255.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/bufonimapilomiven.pdfIn PDF document text
    • http://wangyiphk.com/userfiles/72976761443.pdfIn PDF document text
    • https://ms01bet.com/contents/files/mugokokigovegurumo.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/punikinogolufawajawon.pdfIn PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/66526201767.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.info/upload/files/73418108186.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/sikaka.pdfIn PDF document text
    • http://rayer.cn/d/files/1250874721.pdfIn PDF document text
    • http://xn--80aaaaadfwa5aftjhxrkcrg8iwc.xn--p1ai/pict/file/lomoxawutifetomisuta.pdfIn PDF document text
    • http://morecoredesign.com/images/imageUps/files/numixaremapusejoz.pdfIn PDF document text
    • http://onroerendgoedindex.nl/images/uploads/34014905160.pdfIn PDF document text
    • http://firegallery.ru/img/upload/40865500256.pdfIn PDF document text
    • http://111-orte.com/testarea/cwsCMSlight/media/files/pikafopuzeludujipokuke.pdfIn PDF document text
    • https://allianztc.ro/files/file/negaxulopefunan.pdfIn PDF document text
    • https://sportyou.fr/ckfinder/userfiles/files/69987489267.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/kevipumigovu.pdfIn PDF document text
    • http://studiolorenzoni.eu/userfiles/files/ponexanodexemavidolozedi.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/3627677797.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=redmi+note+10+5g+vs+redmi+note+9+proPDF 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_off0000de89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE89 18060 bytes
SHA-256: eaecd7c003e9a73b2d447744557916d37054570aa615e981725585c02e1d724f
font_01_sfnt_off00010da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B8 11112 bytes
SHA-256: 64b3e58d45453a500d98229328143ebb45df295c6e71d014636f34558897c3a2