Malicious PDF — malware analysis report

Static analysis result for SHA-256 45330baaeddc7b84…

MALICIOUS

PDF

67.9 KB Created: 2021-09-12 22:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5f3047a843a4fa8370df1e0da5b8e680 SHA-1: e89caeb6154fa2f638737c06a25cb60462c1d487 SHA-256: 45330baaeddc7b841185dc560f80b8346a951d109aa50eadce8990274c73a891
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6961

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://smidgel.ru/uplcv?utm_term=average+rate+of+change+linear+function PDF link annotation
    • http://ropesadventure.com/d/files/voxomokizajekibijajided.pdfIn PDF document text
    • http://varadimasszazs.hu/uploads/files/welopenewoxerurejefitazaj.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d96a953855---68526899399.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/84897356614.pdfIn PDF document text
    • https://hsiaoying.com/userfiles/file/60829605882.pdfIn PDF document text
    • http://ecole.ru/text/images/file/67098931837.pdfIn PDF document text
    • http://www.celso.org/download/vixonipes.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/161329ee035e7c---74392267402.pdfIn PDF document text
    • http://bretagne.annuaire-regional.com/ckfinder/userfiles/files/62826401169.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gumolaka.pdfIn PDF document text
    • http://www.polni.si/Images/files/tesaluf.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/baqd5d51qfq34q6cae09eo15es/13015291982.pdfIn PDF document text
    • http://sun-green.eu/ckfinder/userfiles/files/78515363362.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/161322760dafb0---xiwazimikezeb.pdfIn PDF document text
    • http://fittbikese.hu/files/file/57160197045.pdfIn PDF document text
    • https://dalilak1.com/userfiles/file/83801032926.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/36506180463.pdfIn PDF document text
    • http://guchen.ru/d/files/23301795642.pdfIn PDF document text
    • http://iktoktatas.hu/files/file/21747012819.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/30470730359.pdfIn PDF document text
    • https://charteriraq.ir/basefile/charteriraqir/files/misinitujofozolamolame.pdfIn PDF document text
    • http://pol2-simf.ru/userfiles/file/kajumaxi.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///89263515486.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F4 10592 bytes
SHA-256: cc1160691d2f09698f7b14777063d646603c09928ab87db8c604065e37591987

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