Malicious PDF — malware analysis report

Static analysis result for SHA-256 012c715efb96d7fd…

MALICIOUS

PDF

98.5 KB Created: 2021-07-22 03:37:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 425591439ea807d058b4eacecf7ca2d9 SHA-1: d0c49e598b343eaedf36b0a934e54400b1fcd434 SHA-256: 012c715efb96d7fd9d31e6e4e71f11e2aee137bc500c3b909a243ac068859590
176 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, many of which host further PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and compromised CMS upload links suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160898ba637c17---fisum.pdf In PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/454678c82dc5f0700b33ee4f22f5981f/kesafonexurorulo.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/63271ebd6f8a3c93973e3fc44262fc3d/13398628901.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cf21d370ff9---kigegezusunoteloz.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/nogefupabelibusomaribim.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/79678184403.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/58397061941.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/29869834790.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/gudofewut.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/dopesexeta.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210626_30A1BC97E9BF6977.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/b0f1e4cfc0fc60242c700cde446a0996/23603813396.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e0d7f2e11---fesatujagemujuza.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5d777d8fe---dajogakukujowedivoxovis.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/8b780d33ad114a9e11a8ef6750206f9f/xowiwivevuliwolug.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/5076285743.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/d2ed1725dea821c312ac2b5fa1305d89/dupojataropajab.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a453563a4---zakaparajuwo.pdfPDF link annotation
    • http://boldino-hotel.com/ckfinder/userfiles/files/mevij.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/xabosuga.pdfIn PDF document text
    • http://adveotec.com/img/file/89117986789.pdfIn PDF document text
    • http://steps4cancer.org/clients/a/a7/a78c374070a178914b502abaf3db82b8/File/monazaregizipunuti.pdfIn PDF document text
    • http://candientushinko.com/images/file/nadawusosu.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/e12fad6c2cba0acf64c9da35cdc7f23c/dudukaxafibupagevetegimir.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/0c321ab14a32259d58a062b4a85f6044/15531990115.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=iconic+messi+pes+2021PDF 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_off00011e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E00 17236 bytes
SHA-256: 1d0831afa43732bd7c19aba0693981d95caf26bfaa36af1f424d8330a0d2d9d7
font_01_sfnt_off00014ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000162d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162D7 10376 bytes
SHA-256: 24f5a0e9fc4e1715bb283fbbe877199a827994a804aea750067c7e34b1052cec

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