Malicious PDF — malware analysis report

Static analysis result for SHA-256 faae42b02fd32420…

MALICIOUS

PDF

81.9 KB Created: 2021-08-10 22:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0513b69c0ccc0892c144738f240dbe05 SHA-1: 53c7f16c6e5836da8b14f965466828232df3f744 SHA-256: faae42b02fd3242053065a0a21b501f198339861563c3ebfe128473a78766bb6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many of which point to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/xitutudutujejigikefuduj.pdf In PDF document text
    • http://kingwrapcarspa.com/upload/files/xugasuzuralujakuwikisida.pdfIn PDF document text
    • https://aduanaldelvalle.mx/userfiles/file/18149426166.pdfIn PDF document text
    • http://goldenteriyaki.com/uploads/files/jawogin.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/18213861781.pdfIn PDF document text
    • http://suriyedostlukdernegi.org/image/files/lelekupisir.pdfIn PDF document text
    • http://deltastal.ru/userfiles/file/sufodegawi.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/13868113707.pdfIn PDF document text
    • https://maclashoes.it/file/22950883339.pdfIn PDF document text
    • https://hagepoorter.be/files/files/dugod.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16075a2b163199---givefari.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/kopumusamefuxurabimupo.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/b3ec937779d928c7c83ef858b87376f1/58301085660.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb24836f84---70329915589.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/57594921761.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85cbb25ea1---21564499615.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/11796764318.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b878d547259---1756066570.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/lulanizu.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16070815a53eb0---zepusofevuz.pdfIn PDF document text
    • http://viviapalermo.com/userfiles/files/20732737912.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a94f7ee5f---80337373486.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/jaramaregabetonemolor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=download+full+bhagwat+geeta+in+english+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_off0000dae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F8 11004 bytes
SHA-256: 2626843f84a0039be671b5025daeb537e397031610c91a45c246a984dbefb51e
font_02_sfnt_off00010c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1E 18168 bytes
SHA-256: 9462659a5127333e1cd92a7b3803d51d2b35b5e25315904d0be3d988c1dc356e

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