Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8c97750aff2770…

MALICIOUS

PDF

79.3 KB Created: 2021-07-02 10:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 155a5ea6bfc5c0a797442800fb8fde56 SHA-1: 4ef4c73f0b7fcb5c161e0fea31829d631f3c41ed SHA-256: 1e8c97750aff2770f1c51e413c7540287773a1b8f21f6b13fb5206de32a28ac6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and a high ML classifier score. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://queure.ru/uplcv?utm_term=prank+meaning+in+marathi PDF link annotation
    • http://smit-electronic.hr/upload/datoteke/58016312488.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/72332611594.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/zadenaruvulajuzoli.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867d9c2b354---29602560996.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba9c07918d---jepavogunukinulobosaza.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ce50f29bc---89987228310.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/levireduvesej.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f470adbea7---dijudabuw.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/foluraparonarulufejapa.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/20216201253149835.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/ba0354842888d441f6e3e55b0b287e32/fuvided.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/sinozaxakaxopofunun.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/30daae9cc3277b5c8fbbd52dec88d303/bepoluboxun.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/9b24b1211ff8ffcad033097d964f3bff/34568745931.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/88494384358.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/tazafomegawovikoga.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/xeluvakidixozofesogojifis.pdfIn PDF document text
    • http://df-foundry.net/d/files/saxifasemukipomusiv.pdfIn PDF document text
    • http://technocom.pl/editor/file/rolijasikuvelerizawepob.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/97999801f54bd656ad0fcc1e6fcddc00/21315792407.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFE 10312 bytes
SHA-256: e053e77235241fccb6e4ca09d75253107aa138182df95b07cb533e09314244fe
font_02_sfnt_off000101f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F7 17348 bytes
SHA-256: a3e65a2197fd7bedb57e357f21eceb94d37c782913df66df183a054fad86bd87

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