Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e970f028f14ed3b…

MALICIOUS

PDF

86.5 KB Created: 2021-10-28 04:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 2cdf7b58d94249887c7f858883a98e6f SHA-1: 6444e81ce97c8db843bb28ac69fe283c8a904f4e SHA-256: 5e970f028f14ed3b33738426a47f16a4fc663511cda23dd4a4b698d6fe44055c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 5

  • 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.
  • 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://perfecthospitals.com/FCKeditor/file/41330071009.pdf In PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161522df014687---fujexejisivasijasodiwixu.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/50853320992.pdfIn PDF document text
    • http://citlak.de/admin/UserFiles/file/pufolokotatepaduxateleri.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/bepibibutemusi.pdfIn PDF document text
    • http://www.instalacionescueto.com/nueva/ckfinder/userfiles/files/zuzugewaboju.pdfIn PDF document text
    • https://neksav.com/upload/ckfinder/files/xakajefoze.pdfIn PDF document text
    • https://riosemarescentrodemergulho.com/ckfinder/files/96041329037.pdfIn PDF document text
    • http://borisovhlebprom.by/var/upload/file/12021815445.pdfIn PDF document text
    • http://sin-hua.org/userfiles/30212254755.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/nawina.pdfIn PDF document text
    • http://lemma-studio.pl/userfiles/file/temepenutes.pdfIn PDF document text
    • http://xingzhongjing.com/userfiles/file/20210924021315_835685430.pdfIn PDF document text
    • http://nessie-vinylcare.com/file/rivazalode.pdfIn PDF document text
    • https://ontogepszerviz.hu/editor_up/83334487331.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/vuwomuwu.pdfIn PDF document text
    • https://qatarsecurityservices.com/public_html/userfiles/file/77471249462.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16137a994286fb---mafelabotanamofodazada.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/pawem.pdfIn PDF document text
    • https://middletonchambers.com/ckfinder/userfiles/files/39999363549.pdfIn PDF document text
    • http://kerekagy.hu/UserFiles/file/xelitiwiragosomakepa.pdfIn PDF document text
    • http://twilaw.com/files/files/99553385252.pdfIn PDF document text
    • http://lifebeachvilla.com/uploads/image/files/32077245933.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/lerupafizidavir.pdfIn PDF document text
    • http://022-web.cn/uploadfile/file/20210906065744526.pdfIn PDF document text
    • http://teknis.it/userfiles/files/82943770569.pdfIn PDF document text
    • https://palakkadtourism.in/ckfinder/userfiles/files/99909321806.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/TSvcnjQ06Jg/uplcv?utm_term=theories+of+social+justice+pdfPDF 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_off0000ee86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE86 10808 bytes
SHA-256: e7621e965da013e79dad457ca424caf02efc9cdafba5a903e1ec971b2b39e3ed
font_01_sfnt_off00010795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10795 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA7 17164 bytes
SHA-256: 8df61546217b7e3e2ada6ac1b11b3a75d3c5c87c961446e6e7a8bab159c2b92d