Malicious PDF — malware analysis report

Static analysis result for SHA-256 52ecfa6b89f6c21f…

MALICIOUS

PDF

77.8 KB Created: 2021-09-07 01:29:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fb66a7fc2c4dfe6821a68ee9ecc10191 SHA-1: 65e0c599c03307dac8e7e66c4c0a404aa5a3186f SHA-256: 52ecfa6b89f6c21f78f9a38cf5064b194801949ba72e977b527e9e93cf5ca9fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other potentially untrusted hosting locations. The primary purpose appears to be directing users to external, malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://queensflower.nl/clientfiles/gosesukopokipezizirufab.pdf In PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92bcdd8d78---76878952125.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/5a0e577d9a6facdebfbcb388ed7a90fc/32302217476.pdfIn PDF document text
    • https://andrejc.si/files/file/49452668568.pdfIn PDF document text
    • http://fitviewer.de/files/file/24420731776.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd103b00f7---49215821123.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/fomegiresejapuf.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16072c230f1dd0---pemovurababovenizejowexav.pdfIn PDF document text
    • http://vhktn.at/images/content/files/4549745208.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e91dd9ee73e---pugopasul.pdfIn PDF document text
    • https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/dixonapuginomomebi.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/1990ebe4c7092902d6f5837b09b2a32d/bukal.pdfIn PDF document text
    • http://islandpointfl.com/userimages/81536480753.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/50162303905.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/22178eaebe3bbbdba442dc6b439085d4/54406429545.pdfIn PDF document text
    • http://msamerica.net/clients/873634/File/12105017898.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/830303c7792af7ff222c2d901966cda1/97059299286.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/19946141166.pdfIn PDF document text
    • https://adikketiga.com/contents//files/kosako.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/9f67b9cdea8fe2d2e782486cd11b3e05/3228232351.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed928a8d33---74787235541.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/17530397827.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/gaxisenisesafesixepazode.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/98863724041.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/wulavevavudukovilutazev.pdfIn PDF document text
    • http://huntland.hu/upload/file/90257749015.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=shaws+gynaecology+pdf+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000cc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2D 17024 bytes
SHA-256: 469f5c1b951d11eb5806dc70d9d8a8607d22daf46d4d8b7f741ffe08bee02c1c
font_01_sfnt_off0000f822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF822 10884 bytes
SHA-256: 276933d9b34a8efa68cb5d9ef0a88255c29548d5c3ff25e06e2993769fa789a0
font_02_sfnt_off0001111e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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