Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12772612f132d2e…

MALICIOUS

PDF

80.5 KB Created: 2021-09-13 06:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 51692f6bfb76d448ede9b4d99f406853 SHA-1: 6d0dd818f23025c9225f2cbdd9d5a7c902cf722d SHA-256: e12772612f132d2ed996026952d6e200e8c2b1124d7e292e7419df817ed0e952
154 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. Several heuristics indicate the document is part of a link farm hosted on disposable domains, with one URI directly pointing to an IP address, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f947ce4030---59509005355.pdf In PDF document text
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/tukilurirolas.pdfIn PDF document text
    • http://jump360.co/upload/files/20210905141246.pdfIn PDF document text
    • http://apisicul.com/userfiles/files/bodepotawoluboraf.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/14856567075.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/pamibadiwexut.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/nurewotupoxijufug.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/63387450399.pdfIn PDF document text
    • http://www.slenderclub.cz/ckfinder/userfiles/files/75585796551.pdfIn PDF document text
    • https://parc-hotel.info/file/piwiloja.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/luzebadugu.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/10502989466.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133fbb0bf951---47354204378.pdfPDF link annotation
    • http://rsentco.com/upload/file/fofij.pdfIn PDF document text
    • http://vectorma.ru/uploads/assets/file/40181249643.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/nujibot.pdfIn PDF document text
    • http://sieuthivatlieuhoanthien.com/upload/files/17965864805.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/8670032666.pdfIn PDF document text
    • http://thelifelesson.net/home/tappingchanges/public_html/dowalumniusa/ckfinder/userfiles/files/levilamoz.pdfIn PDF document text
    • http://sisparts.pl/zdjecia/fck/file/74192630497.pdfIn PDF document text
    • https://ghnservizi.com/file/13416806770.pdfIn PDF document text
    • http://www.aaar.cat/assets/js/ckfinder/userfiles/files/darakanifolumugorawipi.pdfIn PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/56700646054.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/161357b210bbe5---1316440421.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/40864909820.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=human+all+bones+namePDF link annotation
    • https://easyown.ddproperty.com/datas/files/62027455067.pdfIn PDF document text
    • 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_off0000d743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD743 17448 bytes
SHA-256: 985e88c574e17f383ecf0a97768a22006755ed85cc01b8f17c7e6436f2c916fa
font_01_sfnt_off0001041d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C34 10212 bytes
SHA-256: b85da01273846fc5cab4a84e6047e1235354c97a6f5a6790de90e05461e1c8a3