Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ad16f5a3422157…

MALICIOUS

PDF

83.5 KB Created: 2021-09-19 01:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 84cc75afe5d3c3942b09c4ee08f97406 SHA-1: 79863dba1b1f492bc19fed4c29f338b843dbe781 SHA-256: 68ad16f5a342215799dd5600ca1633d3258258a3c8c41f2351c58e400e557b8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms or disposable domains. The embedded URLs suggest an attempt to lure users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://ketchas.ru/uplcv?utm_term=best+apps+ideas+for+android PDF link annotation
    • http://jysfh.com/upload_fck/file/2021-9-9/20210909105324145597.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/12171274394.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/xapefilejuvupanibusiwota.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/melib.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/84dc59e59968a25a7c9aa0449e3feac3/5630663191.pdfIn PDF document text
    • http://bellamy.tw/uploads/files/202109110103442387.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614211370dd9f---fedevakimugad.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139f62f0e9c7---tobuzudomowenuxene.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jawelifodogezixavex.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/3399413567.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/65aba8fc4eec68c8fbc35138f0e23615/29602317963.pdfIn PDF document text
    • http://vhz.cz/user-files/37234082429.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161408c13368c2---xekilunusibesuximagaroda.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/e2a0c5471b90497088aba862e09ed24f/40802257297.pdfIn PDF document text
    • http://xn--tnqz8hz5cb8l.com/upload/files/gedepolex.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/janamivekopovabixepu.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/513e100fce42430bacd118639a9739d7/vaxoxipavepumeripeteza.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/25124902828.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1360720fd---duxaroraralusujanesifigu.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/rasukekikolemiwemimawes.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/75876933761.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/vupusisuwabijaxawa.pdfIn PDF document text
    • https://mehregancenter.ir/images/upload/files/sadit.pdfIn PDF document text
    • 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_off0000e24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24E 17672 bytes
SHA-256: 02430fdb3165ed37b417c46c13863a44730fc381f83cc90ea3be4886d9076c10
font_01_sfnt_off0001103d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1103D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12854 10500 bytes
SHA-256: ba3da5f018c33547b1b5d10dc7794e62beaf2bcf154156524fb3090636db71d0

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