Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c429feb7d7fec5…

MALICIOUS

PDF

71.9 KB Created: 2021-09-20 02:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cb5f82546a7efbc43dd6b10665f10833 SHA-1: 8e5e9f043fc430028d90d1ab55de210c627c4655 SHA-256: a8c429feb7d7fec5045897c3a703118d50f644c8d05f948c3d2425218c726dd5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS uploads or disposable domains. ClamAV detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing or trojan distribution intent. The embedded URLs suggest the document is designed to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4691

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
  • 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://parejalecaros.com/adjunto/upload/fck/files/25887799012.pdf In PDF document text
    • http://mygiftltd.com/userfiles/file/96760761261.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/ba6f015b7e2d6950d34d347d140595b0/mirowadeg.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/5565621453.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/nivuwitu.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/73522015589.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/jepejinorisepozubewe.pdfIn PDF document text
    • https://jagominum.com/contents/files/riwilisumonofiz.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/161434f5fe0590---32008580706.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/nugafagegukepefugugupuwif.pdfIn PDF document text
    • http://espicycooking.com/files/file///bunudewunilawagevogivavup.pdfIn PDF document text
    • http://jonme.net/ckupload/files/33077464398.pdfIn PDF document text
    • http://allier-genealogie.org/File:/88977328660.pdfIn PDF document text
    • https://r4binsh4h9-att.com/contents/files/wafukawodimimopikiz.pdfIn PDF document text
    • http://madurastones.com/userfiles/file/wavikexiteponixelomuvuw.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wuwepokakizomevolumekem.pdfIn PDF document text
    • http://herborgthailand.com/file_media/file_image/file/16653925292.pdfIn PDF document text
    • http://protezas.lt/i/File/tupinusozududuwoputi.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/wadogonesepivilu.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/97551888898.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26311238839.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16136bd57a5e8e---49650545662.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/jci4mnu5re7k00lj0n6st0hvou/xoposelaxozeveziwifasone.pdfIn PDF document text
    • https://duragloss.pl/userfiles/file/42959715763.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/rivesutikek.pdfIn PDF document text
    • http://music-saikung.com/ckfinder/userfiles/files/73409757331.pdfIn PDF document text
    • http://hnkingdee.cn/Files/file/20219108328.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=root+google+pixelPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8F 10040 bytes
SHA-256: 71f489854d4fa186e60a807c64294e3a6a77a66b6e51ac6459a1f070c846d8b1
font_01_sfnt_off0000f4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FC 18716 bytes
SHA-256: 6236fcabb70e10b18162b31db3f3308459a518ccdab6331f85d6ef79cdbec4b7

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