Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea6b24ce61d7182…

MALICIOUS

PDF

81.9 KB Created: 2021-09-21 06:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e1712663ac0e72ae71a844dc63be1704 SHA-1: 1de0874097f0399abff1997d5307f59eef0a1352 SHA-256: bea6b24ce61d7182ab74d25ba21c01bf6d02ce98a2b97875604467cd8bca7a32
164 Risk Score

Malware Insights

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

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript points to T1059.007, and the overall nature of exploiting a document to lead to external malicious content aligns with T1566.001 and T1203.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://inwebjor.ru/uplcv?utm_term=cod+bo3+dlc+2 PDF link annotation
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/161326b4a3021c---87378773031.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140508a77117---vagidirapun.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/puvituriwa.pdfIn PDF document text
    • http://irs-messtechnik.at/upload/bigodikukixogebafavas.pdfIn PDF document text
    • http://rovitek.com/userfiles/file/xopobun.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/18679069163.pdfIn PDF document text
    • http://ysmenmidwestindia.org/uploads/userfiles/file/file/moluvizovodidegulumi.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/xudoga.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161454e687de9b---63052023051.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/valogifomemafojuje.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/77513416122.pdfIn PDF document text
    • http://coconut.hu/userfiles/file/17612588301.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/jifuzisedegiwato.pdfIn PDF document text
    • http://oawebserver.com/piceditor/file/febeli.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/zowugetomazitanixajefudob.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/mowozavoj.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/joxuguzowom.pdfIn PDF document text
    • http://studioghittigargnano.com/userfiles/files/zivetozuwiput.pdfIn PDF document text
    • http://hjhchem.com/upload/files/73364964584.pdfIn PDF document text
    • http://ztracenaexistence.cz/files/content/file/84615509097.pdfIn PDF document text
    • https://siroyensao.com/upload/files/pepagolefixe.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/24902417953.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/jotojixaxixino.pdfIn PDF document text
    • http://dvif.fr/userfiles/file/wovunovulolobobe.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b63fe62cf3---10336756761.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_off0000db3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3B 18644 bytes
SHA-256: c8deebbeee0004c3e9b92cab5f4d7a95281429785825b5af7732aa02c39aeb3d
font_01_sfnt_off00010b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A8 9972 bytes
SHA-256: 7d82ffabe1e20cdf428ecfffd03aa9b2623a21b86e3311392948ba14102425f6

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