Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0f5ec0418d1c5f…

MALICIOUS

PDF

82.9 KB Created: 2021-09-07 22:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9dd25806d882a9faf94e962ccb7b3a3b SHA-1: 60a0aefaf8023e499a5e6ceaa750b5f3394e3d47 SHA-256: 7c0f5ec0418d1c5fa11560c051da00f361d6f244b7a11c63c1e6bf3eac3f476f
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites utilizing the Formcraft plugin for file uploads. This suggests the PDF is designed to lure users into clicking these links, potentially leading them to malicious content or further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3904cbd512---54389906257.pdf In PDF document text
    • http://autoscuolauniversale.it/userfiles/files/42933117404.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/49651539385.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9688fae1e7---86785117838.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/sofenoget.pdfIn PDF document text
    • http://kamerton.nl/clientfiles/87820993218.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/90886310036.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/61228336301.pdfIn PDF document text
    • https://anjingliar2.com/contents/files/61218103203.pdfIn PDF document text
    • https://pasarangroup1.com/contents//files/18456720021.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/e5oajpampqa0qbpluq0hhc4t1q/85228756866.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/ec9eaed454d3a16df1cacd11e84588a9/bazozugonuluzoketixazipuk.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16113a3cd4a47e---49837868805.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/takuw.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/1648202502.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609934927b17d---29772612172.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210620095232.pdfIn PDF document text
    • http://mmt24.ru/files/file/papatosededorusugamekep.pdfIn PDF document text
    • http://centrons.com/uploaded/file/212222138160bc872f40889.pdfIn PDF document text
    • http://schokozentrale.de/idata/34850695537.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/96943892306.pdfIn PDF document text
    • https://viveironativodevicosa.com.br/ckfinder/userfiles/files/sobufomogazowugesafu.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/29b8ec9ea5026b5dcde6093a91275d27/15081007572.pdfIn PDF document text
    • http://commandhousecreations.com/uploads/files/wekilotaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=purpose+of+educational+research+pdfPDF 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_off0000e023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE023 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83A 10820 bytes
SHA-256: 95636d235549f5307ea5a0f0e3c8c380ecc085175279436ce605dbec14c7e6a5
font_02_sfnt_off00011114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11114 17468 bytes
SHA-256: ff179dc69c39d99d34d5d5f4bf727a79934ce29bb9859516b93198c3da3ab8e7

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