Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8102ed55124a470…

MALICIOUS

PDF

69.5 KB Created: 2021-09-25 21:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4772ebe5bb6aa00c3c7a2127214f0497 SHA-1: 7dedb673984aefa6086447a6b1c173fcdc0d2975 SHA-256: c8102ed55124a4706e54e485820dde9d30ae1fff5b01c6eeb9f6f781e7b4b572
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript and numerous external URIs, flagged by multiple heuristics as malicious and a phishing/trojan. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript and the high density of links suggest the document is designed to redirect users to potentially harmful websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://garglob.ru/uplcv?utm_term=real+football+manager+2013+apk PDF link annotation
    • http://hyunsin.net/userfiles/file/perogixusife.pdfIn PDF document text
    • https://petala.gr/userfiles/file/mifidaxadaxogoxopu.pdfIn PDF document text
    • http://hfnhsw.com/upload/files/98400531174.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/sepasewab.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/pamenexomabu.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/gefibaz.pdfIn PDF document text
    • http://edisonprivateschoolbeta.com/cote_dor_import/admin/ckfinder/userfiles/files/wipusobiligizokomulopefi.pdfIn PDF document text
    • http://www.ddu-hk.cz/ckfinder/userfiles/files/kuxilajorawetirat.pdfIn PDF document text
    • https://healthtecindia.com/userfiles/file/sekipanuzana.pdfIn PDF document text
    • https://cebubigsellers.com/userfiles/file/70424501830.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/pagisezumesopatakisozaxar.pdfIn PDF document text
    • http://teleserviciomalaga.com/ckfinder/userfiles/files/velupolujipugagi.pdfIn PDF document text
    • https://sukaunited4d.vip/contents/files/ditaxoruvabemuga.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/84939590722.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148a0d774411---kukokomafuwoj.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614886301494e---rawatugoxexelavopetirijux.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/pabugezakagogogevovar.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/73295165047.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/97094233756.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/bibitufelivub.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/zaluzirevomamolukekupagew.pdfIn PDF document text
    • https://globalathena.com/ckfinder/userfiles/files/66611303595.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_off0000add4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5EB 11184 bytes
SHA-256: 33a714d610a8d69421f746df2274fac05612cd7c317a6eaeca88d9fbb694ab85
font_02_sfnt_off0000dff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF4 15480 bytes
SHA-256: 7799d6d0115cdd060cd05358d54da5f0aca50fd6cecc309a658db6435c44d70d

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