Malicious PDF — malware analysis report

Static analysis result for SHA-256 61a05d5074b7dfe5…

MALICIOUS

PDF

72.0 KB Created: 2021-09-07 04:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6cd0d6d171a5f99b270a17bd7f5e35d3 SHA-1: ec921732f4d0f98d408253dedea5fe5bd3d54114 SHA-256: 61a05d5074b7dfe5b2b646061ad2564e7037c5f66294d85aa40ce5e5edeec6cf
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites. The ClamAV detection indicates it is a phishing trojan. The structure suggests it is designed to lure users into clicking links that likely lead to malicious content or further compromise.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4060

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 https://queure.ru/uplcv?utm_term=pink+panther+partitura+piano+pdf PDF link annotation
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/7f68258877774db76f47131941bf4dd8/ditexepokosuroximevowikap.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/bufez.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aac7bbcae7---rurawoxeras.pdfIn PDF document text
    • https://duongthuy.net/userfiles/file/latisadagu.pdfIn PDF document text
    • https://intrastorg.com/userfiles/file/75203575366.pdfIn PDF document text
    • http://falerisztika.hu/tmp/xunusugem.pdfIn PDF document text
    • https://masukpt1.com/contents/files/82934095925.pdfIn PDF document text
    • http://altinay-law.com/images/file/28180098664.pdfIn PDF document text
    • http://qzgj.cn/upload/file/migifunomutabex.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/77513448233.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608336eca14bc---vumigotatatilesitebup.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9c9e0cbfb---tipodurubudux.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/17740863295.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100a8e62b826---85465433995.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/33474017055.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/71193336062.pdfIn PDF document text
    • http://bendhorseride.com/userfiles/file/jidusurig.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/39925a533381a05f6e15277517f87c55/84302553527.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6bb8b3494---gibaraxemaxelim.pdfIn PDF document text
    • http://hoya-system.com/uploads/files/202108291434535996.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba8f073b50---pasigewufegovulasafepa.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/fawijobisov.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/ddea4221b1f9fe5e29fe64260f1f0d4b/pajevuwu.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160817dd2d0e5e---13356761645.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/kokujemuvo.pdfIn PDF document text
    • 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_off0000e7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10007 10576 bytes
SHA-256: 073f98d85c67de34a600a3a5e2eb8ba7c93564340a1a95910054434fd91fffd2

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