Malicious PDF — malware analysis report

Static analysis result for SHA-256 142473ab3fb8929f…

MALICIOUS

PDF

78.8 KB Created: 2021-09-06 05:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bd25e9652f0c7a96e5027778b2a292b6 SHA-1: 89e7aef9f34039a54ecadb11a2cdbb020822eb36 SHA-256: 142473ab3fb8929f86324af3ddc304f7602535b3ff5fb6637747116b4d136a0d
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, characteristic of a link farm designed to redirect users. The presence of these links suggests the document's purpose is to lead users to external malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://peptidturkiye.com/ckfinder/userfiles/files/36929721997.pdf In PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1bd9c2cc2---60218610662.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e5e2d660e---vixuw.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/afe122af0b7ab9cd9e90ff52cbbf01fc/bupituzete.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/7h33u8j8cgvm0ogjpmqdukugl6/87880020363.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/sapupudaretoxukex.pdfIn PDF document text
    • http://wsm.hk/images/files/lexasolapapexewofipukure.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102d2bfa5f0c---zoxadonoxadawimozabaf.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/644fd9171de94b1f4c4a308a9d8d25fc/86106912995.pdfIn PDF document text
    • https://codecs.ro/images/file/ruwowadin.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/vexivimomedesozufotokija.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/lotelalusevibosixelewod.pdfIn PDF document text
    • https://sca-kc.org/scauserfiles/files/jilosew.pdfIn PDF document text
    • https://qualitymattressfactory.com/admin/userfiles/file/folifisiz.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/55834819114.pdfIn PDF document text
    • http://madiagranitosilano.it/userfiles/files/jelilazivi.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/16462168284.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/62420572097.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/10248274287.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160727d0298b85---8434164926.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/a8b277ed1e389ad311f9118b9bbff0e0/32843535240.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/lodedesagaguxujupotuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=roland+juno+di+user+manualPDF 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

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_off0000cd94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD94 18392 bytes
SHA-256: 707dcf4c2224ba97daafb9fe7b6487ee731656327c7e811c6946ccde1e7dcca6
font_01_sfnt_off0000fd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11576 10584 bytes
SHA-256: 395fce8f290f6a2f1cfd370be63a5dbbb88844f211631200f1edd3eb9763fbe2

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