Malicious PDF — malware analysis report

Static analysis result for SHA-256 537855103846754b…

MALICIOUS

PDF

48.0 KB Created: 2021-09-21 04:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1b76ddcfa59c4069eeee2e03c3c49162 SHA-1: 9714156549c298d5cc988e7cb24381efd1194408 SHA-256: 537855103846754b3b5298ce8f6d33f2f898d08a26cd2a0689af6c04594468c3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which are hosted on disposable domains and appear to be part of a link farm. The ClamAV detection and ML classifier indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of external URIs and the nature of the links suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the overall structure and heuristic firings point to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5934

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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
  • 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://oniceh.ru/uplcv?utm_term=sukkur+driving+license+verification PDF link annotation
    • http://ozdesignhouse.com/app/webroot/uploads/files/kivasipilanabogelefa.pdfIn PDF document text
    • https://telliogluhukuk.com/userfiles/file/60094286795.pdfIn PDF document text
    • https://karlschool.org/uploads/files/202109151706307874.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/pejanomupav.pdfIn PDF document text
    • http://trunghungplastic.com/luutru/files/vuzedevuwubex.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/84092117369.pdfIn PDF document text
    • http://yingtailong.com/upload/file/210907040747407905se5c4hopogjd.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/16949365842.pdfIn macro / runtime command snippet
    • http://lifebeachvilla.com/uploads/image/files/zozewufewipib.pdfIn PDF document text
    • http://dkind.net/userData/board/file/zamivosimotupadoxaxop.pdfIn PDF document text
    • https://nyirfa.hu/uploads/files/bekiwudonodirubiborijukam.pdfIn PDF document text
    • http://godsownproperties.com/userfiles/file/xexugenipekekutefuv.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/sotaz.pdfIn PDF document text
    • http://cokhilegia.com/upload/files/zimufozesoz.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136db20b0771---jamifowepusuvajazedosatoz.pdfIn PDF document text
    • https://abisspaandboutique.com/nbloom/fckuploads/file/48377331660.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/nvta8qdrrtvdq5uegdi4b30e3g/2319731011.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/lalotiresifezi.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/jifetu.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/1157263957.pdfIn PDF document text
    • http://b40555.handyfriendship.com/upload/files/valitupati.pdfIn PDF document text
    • http://youzedu.com/ckimages/files/20210907210817416571.pdfIn PDF document text
    • http://gpkoaee.ru/ckfinder/userfiles/files/40361408743.pdfIn PDF document text
    • http://yingtailong.com/In macro / runtime command snippet

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