Malicious PDF — malware analysis report

Static analysis result for SHA-256 646257c6972890b8…

MALICIOUS

PDF

63.8 KB Created: 2021-06-21 08:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8fb2110d362628dc1154b5d2eebed6bf SHA-1: 5368811c5ff43b2c6a8d686fe990dc6f4c20f6ef SHA-256: 646257c6972890b87b63486799b32cb73af2d8ce3f26de4bfcc17dc2974caa3e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to 'pondering over the quran pdf download', likely a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/35145197164.pdf In PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607550df48b9e---74008499567.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/6m56l1sdqiventspjo6vivae33/74578962763.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0ba08c87b---62537095852.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/23148922339.pdfIn PDF document text
    • http://ypdtools.com/ckfinder/images_store/files/14304778050.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd94aaa66f---wimexijinijiroxanuferame.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8adc5a7ea---94506330331.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/da5ab91e9d137e86792db992c78fe632/86442627574.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/53015477024.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/4g9k7tkr2vt9u38rqkikkbvgai/sakogodokivanutemabur.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/bowawumibatezevoposaxef.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/e5uresedsd71fc1k6eimfm8gu1/koramaxusojupimelus.pdfIn PDF document text
    • http://russia-ex.com/zolonedesetoliwonusukij.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/81162989545.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/46e23e5c5c46e48ee1cc1857569e588d/551907815.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/9060b00aabb9107bb660fc980d62f16d/wutuperomomanotenikeruziw.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/xulefit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=pondering+over+the+quran+pdf+downloadPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1E 5404 bytes
SHA-256: 59e50b20db06963972e3b29f2da3bb896fb83564106792440ea46c76975b004a

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