Malicious PDF — malware analysis report

Static analysis result for SHA-256 84ba97ebf22b1aeb…

MALICIOUS

PDF

41.5 KB Created: 2021-10-02 22:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f645fee2407a8a2adde35ae2f947d50b SHA-1: b474163ed9dd43a4a124d7107a9b2d8ec38a2d16 SHA-256: 84ba97ebf22b1aeb67affc1a7042780974c3c446b2da986dea771f24201907e6
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials. The presence of 'LOLBin token sequence' heuristics further indicates potential command execution or exploitation attempts within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8636

Heuristics 7

  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://dinobajka.pl/Upload/file/44545332957.pdf In PDF document text
    • https://hogozaty.com/ckfinder/userfiles/files/jivetixute.pdfIn PDF document text
    • http://princeverma.in/uploads/files/21332981992.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149efdab5662---pebadilijos.pdfIn PDF document text
    • https://araprinter.com/ckfinder/userfiles/files/99889617027.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/80809394780.pdfIn PDF document text
    • https://stka.gr/ckfinder/userfiles/files/zaxubuno.pdfIn PDF document text
    • http://italy-ex.com/images/blog/file/luvijolupojuworud.pdfIn PDF document text
    • http://fred-robin.com/ckfinder/userfiles/files/74285494693.pdfIn PDF document text
    • https://marsanz.pl/uploads/fck/file/nibosuwud.pdfIn PDF document text
    • http://savages.lu/imagesRTE/files/72103134723.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/2ab983d6481523142b5c2b204dc42d9e/fogotagozijapemasivux.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161460e14336d8---jetabejapedebivekapazebez.pdfIn PDF document text
    • http://studioambienteterritorio.it/userfiles/files/nijobibunuwulumidatilizex.pdfIn PDF document text
    • http://bjdfszwy.com/filespath/files/20210904005500.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/dizolijodafijajefejux.pdfIn PDF document text
    • http://myphamvickwhitebeck.vn/luutru/files/27833101939.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/79853482480.pdfIn PDF document text
    • http://hamzalegalservices.com/userfiles/file/vorezitedawamof.pdfIn PDF document text
    • http://stonebreaker.at/nomolebavidozi.pdfIn macro / runtime command snippet
    • http://dissanna.com/temp/fckeditor/file/76520915365.pdfIn macro / runtime command snippet
    • http://vizesblokk.hu/files/file/41925526448.pdfIn PDF document text
    • http://hamzalegalservicIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=i+am+going+to+stay+in+spanishPDF link annotation

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