Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5b95fed58292ac…

MALICIOUS

PDF

82.0 KB Created: 2021-09-02 23:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b8d53625b195c84d68f94f0444ad10a9 SHA-1: 96e167d19c33ea564117142f21bad1de61131038 SHA-256: 2f5b95fed58292acbe4d5ccb28ce57b76c5f6c753bd3eebc7d45d55921aa7b85
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised CMS uploads or disposable domains, indicating a phishing or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to malicious content or further stages of an attack.

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 http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/15052280730.pdf In PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b80694519ca---xekosib.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/firunisageda.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8d744b5d4---4439020838.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/rulunefekojeki.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/35128502927.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021061018161873499.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/34432071495.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130ee3fcb868---nuwek.pdfIn PDF document text
    • http://specimport.by/files/files/xilezukotiva.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/d4224ae78e0a1ff3f32f33ba25abbdbb/90223743362.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/watugopelojulumizisolix.pdfIn PDF document text
    • http://epmachine.ru/d/files/14864219713.pdfIn PDF document text
    • http://fygl.net/uploads/file/050437381868.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/jotosejuxemodiwijavejele.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/luzajavamamobude.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/4319273715.pdfIn PDF document text
    • http://ltmetal.com/userfiles/files/saxilizitasusufo.pdfIn PDF document text
    • http://cudicio.it/images/file/depuvixidowexovekaxeduxi.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/ruloliwi.pdfIn PDF document text
    • http://myboydfamily.com/clients/7/7f/7f513a2250c12de81a70a6735749c289/File/wejuroposamafivu.pdfIn PDF document text
    • http://axwelindia.com/uploads/73684137539.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/50404181696.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=whirlpool+microwave+convection+oven+over+the+range+manualPDF 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_off0000da19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA19 17948 bytes
SHA-256: 235711d7ec7ce1d63e94a297118988fe95cadf995683701c7e91b2faf5b76b62
font_01_sfnt_off000108ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12103 10896 bytes
SHA-256: 48273693467a0815d040032a02c6ceeed63b591d87f1a622edb5937a94a42caf

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