Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60ec40ae02cf35e…

MALICIOUS

PDF

81.0 KB Created: 2021-09-17 09:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e75d45fdd26e0f09108fa87af3c3a162 SHA-1: 37ee2e64520981c352a7c524fdcb8e55e36a11de SHA-256: a60ec40ae02cf35e063efca1fc5b461f8d8933bc5e5b64ccb7dfcbc0b7c8a219
164 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of a 'download button' lure further supports a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://wastran.ru/uplcv?utm_term=cheat+engine+apk+for+android PDF link annotation
    • http://sl-light.ru/design/img/upload/file/38708257861.pdfIn PDF document text
    • http://manenshop.com/upload/files/12481919168.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16141888864f73---98677449514.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/45589935526.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/om2avssnqesdbp998skvt3r4q6/2388025827.pdfIn PDF document text
    • https://parfumzone.ro/files/file/86456076495.pdfIn PDF document text
    • https://jagamimpi.info/contents/files/fomadelimusi.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/baligutopewuwodadavik.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8794c3c6e---24506039399.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce6dfe7004---gotepiwoziseruxuk.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/54542250350.pdfIn PDF document text
    • https://keluargamimpi2.com/contents/files/23554444754.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/57560507814.pdfIn PDF document text
    • http://unseretochter.com/images/file/87009798831.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/35771951250.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/78454940789.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/peberuwotudetaniv.pdfIn PDF document text
    • https://mr-alian.com/upload/ckfinder/files/bimelotemoka.pdfIn PDF document text
    • http://mensagemcrista.com.br/ckfinder/userfiles/files/xovadepuxotinowofuvoz.pdfIn PDF document text
    • https://gujaratisamajparis.org/upload/files/xoxawunomidikojiwana.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/tivofoda.pdfIn PDF document text
    • https://shibbirs.com/media/files/mesaxen.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/nefoxadatonikokifux.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_off0000d7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B5 18004 bytes
SHA-256: e5fa31e1498d2f413421b102a10e2c73cb2ac083cec36b9b7eda6ba203de9aa3
font_01_sfnt_off00010652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10652 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E69 10688 bytes
SHA-256: 2b2a1b45b30fc7929cd35e77eb0a7e95060db9dd42169f8d52ed617b62b94a2e

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