Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d8fa2d28099e06…

MALICIOUS

PDF

78.4 KB Created: 2021-09-19 08:38:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fa97cd55f534202e00e7bb2fe2cb045e SHA-1: 51f2c2033dbde8741ed487491aa82512d5984864 SHA-256: f3d8fa2d28099e068db1a4b80a1486fa682822a9b700ad4980463786051207d0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to host phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crysiq.ru/uplcv?utm_term=free+robux+iphone PDF link annotation
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/0c3323f0df4665d07e79cefbfaa218d4/medosidedukekobafij.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16136706918fef---84521740791.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/galenomusavuli.pdfIn PDF document text
    • http://kaymccarthy.com/immagini/file/daxujunekifikuwejepimerig.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/30344bd95d5bab8cf01387b613c02a75/nifubumoxuvazol.pdfIn PDF document text
    • http://sake-tori.com/images/library/File/64229240152.pdfIn PDF document text
    • https://yk-tech.com.tw/ckfinder/uploads/ckfiles/files/39350606421.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161344618c1ca8---kimizupuvelu.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/livelivexi.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/fowusuzalumofugi.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/e4ccf5738de1a043a0b87d14a3ef1dbf/dozifagejasogaze.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/zesajiropuk.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f88234d5f---momezolikaxidis.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/rasetuse.pdfIn PDF document text
    • http://myphamasia.net/upload/files/97311689649.pdfIn PDF document text
    • http://onlinetalk.jp/app/webroot/img/fckfiles/file/wagufoxik.pdfIn PDF document text
    • https://baptistfriends.org/media/51754681833.pdfIn PDF document text
    • http://brilsports.ro/userfiles/file///fiwozitawamuxug.pdfIn PDF document text
    • https://0900107678.com/upload/file/51579628862.pdfIn PDF document text
    • http://mediasingrid.com/js/new/fckeditor/userfiles/file/23359453969.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161355717854e5---goket.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_off0000d01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE831 17620 bytes
SHA-256: d3b97e6a18820c59d51c18d3439999b0b31c00f3f90843ec148dca129c863b0e
font_02_sfnt_off000115e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E2 10192 bytes
SHA-256: 6b0761c4e85475f69c1d07a1663580180d8b96b4661da53030d3dd9f3390a81f

Open this report in the interactive analyzer, or submit your own file for analysis.