Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d07f675a3575ad…

MALICIOUS

PDF

84.3 KB Created: 2021-09-04 22:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9f813593414df5090311d557be02441e SHA-1: e803139c98f1f053e4643d6902775e441f1963c4 SHA-256: c2d07f675a3575ad04671b37b1715adade4d36cf5825f2e33e65859f153f6982
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users to malicious sites. Several heuristics indicate the presence of link farms pointing to compromised WordPress upload directories, suggesting a distribution mechanism for further payloads or phishing content. The embedded JavaScript and external links are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/7ed4d4088eb530f825a820f56612dc23/selukefokiriwonezovad.pdf In PDF document text
    • http://harchovyk.com/userfiles/file/48810102340.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/87073318025.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/tr8faspmib0fl8e561451l7vrm/fisavamerizapavemujefed.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/46156f3f6677b50be0637fbd11cd556f/60852039763.pdfIn PDF document text
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/39241243223.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160e168c49c99f---55959030004.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d15242dc62---19700542218.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/tipaparodomagemamesa.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/50510663887.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/71f12ppurk5k3cg7p61inq8395/56817200339.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f29b9434e6---pedegejiwijesuri.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/86748501103.pdfIn PDF document text
    • http://nhs1966reunion.com/clients/1/1c/1ca8f1639ee69cd7806809ed3bcda9bb/File/8043307189.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160729dfb2244b---76386338131.pdfIn PDF document text
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/vakirifunemotasabuzog.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/84358233166.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/49732326703.pdfIn PDF document text
    • http://rafaelokazakov.com/file/kesiji.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/xivotupuwuwufikofizapawep.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf4fab7175---lugixaloxezuxi.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/vosogodujukuzezitugiru.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e68d87c3588---22890457849.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/99934752086.pdfIn PDF document text
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/nulesepenibigijozuzoj.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210621083704.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+improve+teamwork+in+the+workplace+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE556 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD68 17076 bytes
SHA-256: 3bc42aafb8ca5c3491d261d4ec63af2906b350374867063e0bc19e52f29d1d71
font_02_sfnt_off000129e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E4 10952 bytes
SHA-256: d693f1c0c85e4371f9081d0a02b0397b0b82a1ef09cc3e7343eb000f6bb2048e

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