Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee00bea493a2df54…

MALICIOUS

PDF

83.7 KB Created: 2021-09-19 00:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3da903648ae97eeaf5c063c8d79c34de SHA-1: d10a7166d234dda0bbe47e2ff65383de887e94ef SHA-256: ee00bea493a2df541f79d4fbd5c56c21b361bbed37b9d89411035f90843615e3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for delivering malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects users to external sites, as evidenced by the numerous external URIs found, some of which are associated with link farms and potentially disposable hosting, suggesting a phishing or scam lure.

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.
  • 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://www.whoamiandwhyamihere.com/ckfinder/userfiles/files/nowezazorivurinufal.pdf In PDF document text
    • http://myconnect-thailand.com/image/upload/File/gorunivipub.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021091223142973499.pdfIn PDF document text
    • http://gyogytornasziget.hu/uploads/files/72293994572.pdfIn PDF document text
    • http://rigosarchitects.gr/userfiles/file/pugigexoluzalex.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/fopikunafepabubuluro.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/37505995634.pdfIn PDF document text
    • http://lica.plovdivweek.com/js/ckfinder/userfiles/files/zixokiwalujarexudoduxe.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/89236993006.pdfIn PDF document text
    • http://anael.fr/fckeditor/userfiles/file/6482576114.pdfIn PDF document text
    • https://balarampurblock.in/ckfinder/userfiles/files/74873078948.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210917124717.pdfIn PDF document text
    • https://sdudyogtechnologies.in/ckfinder/userfiles/files/66235379768.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/cc4a79f0310692265be6c0de4b3188c5/fusep.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/161321be55a5ca---61978957664.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/kiziforasurevexopafa.pdfIn PDF document text
    • https://masini-de-ambalat.ro/images/userfiles/89056450911.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/madirutanobovejunovox.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/61402916937.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/14591872422.pdfIn PDF document text
    • http://drxzhang.com/userfiles/file/88252064197.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/fedomebuvube.pdfIn PDF document text
    • http://vagyonvedelemszolnok.hu/admin/fck_upload/file/govawotejorom.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/pofavejez.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/gemosimorugiresuxabemij.pdfIn PDF document text
    • http://hrampetraipavlavosstanovlenie.ru/content/images/user/file/18148790083.pdfIn PDF document text
    • http://electronicaindex.nl/images/uploads/taduwewifizibagobat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=how+to+make+bootable+pendrive+with+androidPDF 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_off0000e0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B3 18068 bytes
SHA-256: 660ca2866b9f545368cd23931d3e2887909f07663bfe54ee6f5856d0dd30f6a8
font_01_sfnt_off00010fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D2 10864 bytes
SHA-256: e52f42da1077641335375c047348fed912b87aaca69c4ec44118f5e9ca60c95c