Malicious PDF — malware analysis report

Static analysis result for SHA-256 64c95e8e85b94154…

MALICIOUS

PDF

106.6 KB Created: 2021-09-05 08:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 69afebf2e0f82b95d39df7832630323e SHA-1: 23a34717ff2f13811388fe6e0d6c90a3b7cddde6 SHA-256: 64c95e8e85b941540ccf7866def9985e8f4fd35f1070fc34d386f50bb3d4ba8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous links to external websites, many hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9881

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://drafthe.ru/uplcv?utm_term=the+great+secret+maurice+maeterlinck+pdf PDF link annotation
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16092d9c419532---vomorilagu.pdfIn PDF document text
    • http://gajagotour.com/UserFiles/file/fodiniz.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/ed3ddf451da56c828f5799e531c7453a/pilosumupolu.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/ns8pt4jh90t9srrpmmd59c6pd4/26804899672.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be00cd8d9e5---nukikav.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6e184d2e4---vutugakatobopupijunerajo.pdfIn PDF document text
    • http://doradcyprawni.com/images/pliki/9019634006.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b08b0633b275888b96b65eed6e93fdf4/94477995962.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de92bcc3160---zoxagizarabewonefofilas.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/255153931dc505c94f086360cc812647/fafasa.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/89753870188.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/60438838528.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dacffbcee91---29609147094.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087268708c66---nabok.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/879c6f171183d59421301e6b2e22d5e7/vovupukuderilovitusef.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5523283664497b6bf25ba5a20e23f432/47333598517.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/disimametuluwimajasujotu.pdfIn PDF document text
    • https://mmszke.hu/files/file/82365377416.pdfIn PDF document text
    • http://alltechsro.cz/files/jotevenaledegeburotoz.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/78066033117.pdfIn PDF document text
    • http://fitviewer.info/files/file/94868936795.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/wofimevejokubejejalukafef.pdfIn PDF document text
    • http://hms31.ru/img/file/6022311076.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/jebijadodute.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/f4eanks4hqf5mg8lquhfn15dru/parowajifupugin.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16115f9a845e68---24256076050.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001376f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1376F 11104 bytes
SHA-256: a4615633afa1fb076f197ad3ca6113bffc63708f868f67937eb9c4fed5792fb2
font_01_sfnt_off000150ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150ED 19616 bytes
SHA-256: 399d9da22a7e7ba5c4bf2adbcf139a91b00a4128e70eab688dddd47929a96ad8
font_02_sfnt_off00018411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18411 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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