Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be7702d1d9c8da9…

MALICIOUS

PDF

63.7 KB Created: 2021-07-26 03:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a03f7ab83fb59018fac694b1203537d8 SHA-1: 3aacc54f35e27123fe1bde6c4e336ae6db18d5d1 SHA-256: 4be7702d1d9c8da9684e578ba01be29ac4091eda0d5b5c5e1b5682ad81f7ed74
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. These links likely serve as a distribution mechanism for phishing or malware, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7552

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://liniagdanskzydowo.pl/files/dosafipuwokarajote.pdf In PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/4091b81fa973662d938c3809af00bff9/49957327249.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/529a7a46f17d7b3ec7aa6d311e3cfcf4/vufudenudi.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/39419006429.pdfIn PDF document text
    • https://araprinter.com/ckfinder/userfiles/files/88754523176.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9e859be1b---varuzalovipamu.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/33846410520.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c772d01cee2---midurepizapimozemozu.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/79151799936.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a883547e47d---zejadarelarijasikiza.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/45854953685.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/53j8ml6a7gaule0i7b6kj43l2u/murakigigukuzope.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/eb5e958c437786bc7bee30a023ac3f98/bolawenezaponela.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/sp115mur9jrbd1c8ri0plo7rdt/rofijopebisubaxasobefelu.pdfIn PDF document text
    • http://www.gdchgs.com/admin/img/files/90688065070.pdfIn PDF document text
    • https://www.natursany.com//ckfinder/userfiles/files/xumugejumutiz.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/pafutagowetozosaf.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607fee5a42418---93719831486.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607555ea7f605---76627035559.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c65f1cc18f---gamutudokupo.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a02e1b2bf8d---fuvep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=this+time+lucky+in+game+lucky+in+love+%E0%B9%80%E0%B8%A5%E0%B9%88%E0%B8%A1+2+pdfPDF 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_off0000ceb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CE 11420 bytes
SHA-256: 996486a7a4952fb60dec74d2ea5a80b4ff12e23a0cdf026430185d87e82ebe0b

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