Malicious PDF — malware analysis report

Static analysis result for SHA-256 274a8881f3d15d69…

MALICIOUS

PDF

70.7 KB Created: 2021-09-18 17:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ea07d09b016970508d5a10e71168c4d6 SHA-1: e9a9daa158715063e4a2f92b3a48fa77b8263050 SHA-256: 274a8881f3d15d69d0fda610b322d1ddee318fd3020516f612cf37aa38047bbe
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to various domains, some of which are hosted on compromised CMS uploads or appear to be disposable. These links likely serve as a lure to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3973

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 http://105chers.netsociality.com/upload/files/98591212359.pdf In PDF document text
    • https://network-italia.it/file/rafuvoneboki.pdfIn PDF document text
    • http://receptlap.hu/files/tajap.pdfIn PDF document text
    • https://goez1.com/10005001208290177/ckfinder/userfiles/files/40984432758.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/nogopak.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/32971935446.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ffacfd8b53---50042684932.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210915155641843.pdfIn PDF document text
    • http://briztravel.com/upload/files/zazelapexubilililujikadox.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/xepamorugolafetimuv.pdfIn PDF document text
    • http://moscowfashion.net/content/xuploadimages/file/79943069753.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/93183429168.pdfIn PDF document text
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/30035460348.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/gabuzogozezezinitak.pdfIn PDF document text
    • http://nazycakes.com/userfiles/file/jegurupexu.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/wijasigizekumux.pdfIn PDF document text
    • https://loyalangkorapartment.com/userfiles/file/rowoteton.pdfIn PDF document text
    • http://cloudinfo01.smartevolve.com/images/ckeditor/files/27574866665.pdfIn PDF document text
    • http://xn--b1adrijbbb.xn--p1ai/upload_picture/77955446191.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/10da6fb6d47b9509d957e8a05f2902ea/16488332061.pdfIn PDF document text
    • https://trainova.com/userfiles/file/15394591338.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/a90668721ebe80965162d90e71f0d66d/47556645093.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/16bb4a7f23062d114602e19c4e25b8ad/boforuxesuxurupinana.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/zidotebana.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=top+live+tv+apps+for+firestickPDF link annotation
    • 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_off0000c454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC454 16308 bytes
SHA-256: 24d1caff9d4560e15764db0fb5a5d7adb42cc5ee993f738f7b314c928e8ee2e0
font_01_sfnt_off0000ee40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10657 10492 bytes
SHA-256: fe39e5508d2d5b129f1e01b87455d4a8ad48486d9957520f541d20acc734633b

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