Malicious PDF — malware analysis report

Static analysis result for SHA-256 c727862d420ea50b…

MALICIOUS

PDF

87.4 KB Created: 2021-08-01 22:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5d0f799664c22032437144db04ffcb4a SHA-1: f5886a56b8e8c3c013f05ec7a18aa2f5a27ee91a SHA-256: c727862d420ea50b54ee1b3a8cab1ca4dfe0b6a0e5ba222a2eb26428866294c3
196 Risk Score

Malware Insights

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

The file is a PDF that contains numerous links to external resources, many of which are hosted on compromised CMS upload directories. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746df151cb2---40838850850.pdf In PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/xitaxesubetevubejajobivi.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796fbe7ae81---53189252626.pdfIn PDF document text
    • http://kotolantopeni.cz/file/96072351790.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/11b6049ca4e1ac53b39ef985103e8724/lavasunevit.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/koreviwujikoposafujew.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a94a8aa6fc8---97239701374.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/46101603606.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/82677232118.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/r0rnkealtsh37ei6ppfkpkonkk/30439818635.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/rivemutuxav.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/gafibosekaloxiwena.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/3f13bbf071b6a8890515cfffdf26be3e/zudojovonizokidusonipom.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/42936516540.pdfIn PDF document text
    • https://samowar.me/userfiles/files/bavadufalig.pdfIn PDF document text
    • https://www.disbel.es//ckfinder/userfiles/files/57971649313.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098ccea272c3---52868224517.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bcacb54e8---dolegizijunabuw.pdfIn PDF document text
    • http://cphs1970.net/clients/877309/File/fefudir.pdfIn PDF document text
    • http://envigest.cz/upload/file/70257591790.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/vekevejokiberofirobaw.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b1804b3c5---53651016422.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/mivesarobudaxu.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160abbcdcee31b---86139616682.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=descargar+programa+para+unir+archivos+pdf+gratisPDF 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_off0000edcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCC 17912 bytes
SHA-256: fce2643a87cc4852adf521a8f05e0b2a0ede007031473742049ae5f6681885a6
font_01_sfnt_off00011b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9D 11188 bytes
SHA-256: b5a45dc4cba064aec10e36ee64252bbd727d21286df7a71f7959a98bdee2e80d
font_02_sfnt_off00013578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13578 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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