Malicious PDF — malware analysis report

Static analysis result for SHA-256 10579c0d5aacd32e…

MALICIOUS

PDF

75.8 KB Created: 2021-09-07 06:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fe193ef467fe62cbcbe560a0a86a9867 SHA-1: 6cad3c377788dad91c934a6c5857e1ef45f57d4d SHA-256: 10579c0d5aacd32ee91dbd944b1fe1e961198bba48c6f3d2866a7dbad6bc4601
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URIs, many of which point to potentially compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the structure and URI patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcadbd46d12---81441131114.pdf In PDF document text
    • https://femagnet.com/upload/edu/article/file/kubuzolikak.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/84148946356.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/7f6f275dca00ae407a53ca7e2d736fc1/18820137552.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/juwebelejividamuxamiluna.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/10712202945.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/67161434797.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/52781628224.pdfIn PDF document text
    • https://hijaulumut.com/contents//files/lelomunivedomazijazi.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073aa6873676---koworikibojaxivabew.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3889517978---74988459573.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753e9258039---desekagifomedekaxorapep.pdfIn PDF document text
    • http://cameranichietsu.com/luutru/files/kediko.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/44667085943.pdfPDF link annotation
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/tu85mi2pq08jsffnttsoir9bg2/sodakufo.pdfIn PDF document text
    • https://agros.net/uploads/file/76515712036.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/161216e69a4eed---5847132987.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/ragejov.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a1e2998d4---mojawufulivilivutof.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/akrskrjlnpifeeknsrbfc0rc2e/zikukarolegatomixunu.pdfIn PDF document text
    • http://changrung.com/ckfinder/userfiles/files/75486476107.pdfIn PDF document text
    • http://coaching-scolaire.net/userfiles/file/buxuxuwuza.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/27059631194.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=mekanika+tanah+craig+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

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_off0000c6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F6 10652 bytes
SHA-256: a96a852a25d08ec768fb56fe18f6075fefd375b7dad274feb942ab8254a0cc2a
font_01_sfnt_off0000df12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF12 16664 bytes
SHA-256: 06eb77c5125df8c7733631ae1e31fc59ca3bf5b6203150b8c7fb0556825bc7c4
font_02_sfnt_off00010a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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