Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b60cbda1f15fee2…

MALICIOUS

PDF

365.6 KB Created: 2021-08-11 15:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ec48a70b97e52156842a70c09558dd69 SHA-1: ae4e72b5467325efc58f6546455e36c803ea6e07 SHA-256: 3b60cbda1f15fee2d78f647acb43025b06fa3e76e04361ed4442eebed63fb843
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links, with a critical heuristic identifying a link farm pointing to a compromised WordPress upload storage. This suggests the document is designed to redirect users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, limiting the analysis of specific execution techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8562

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/kejeluvaxariviv.pdf In PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160d067c38f49d---jorejurotig.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/e522fc40fc8cd7627e7bf2fb880b827c/78184904019.pdfIn PDF document text
    • http://ros.by/ckfinder/userfiles/files/29845279304.pdfIn PDF document text
    • http://glotecgh.com/upload/editor/file/gupevador.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a41f9f667---60843075316.pdfIn PDF document text
    • http://womenscouncildallasarboretum.org/clients/85748/File/rijagofagadokuba.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/13851386300.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d3961f80650---ravaborabatawixunixe.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/bojadazijelukigo.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/c2455c7ccf17139282ea0536353e336d/60312523886.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c30086559f---zoseje.pdfIn PDF document text
    • http://sun-tes.ru/files/file/xorapukebukusufida.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3a9684665---fotet.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/73157289202.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d4c72c81a---gadorukitokazozarepiber.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfda2548332---63215159971.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/rozebadopaxuligorawefa.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0727b35396---72081401747.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/uueopgbq8ng7v51oojv0bf1rd6/girudererororirekotowafu.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/8ea513a616c1eeab21544c02a6bd3cc3/fufoniwa.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/18347185768.pdfIn PDF document text
    • http://hydrem.ru/images/file/vategojojimedorabuwepa.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d9fc4b9d2f3---dopunosakefatifeza.pdfIn PDF document text
    • https://kaptenhoki.net/contents//files/pajumetimadi.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/dekovulavanesaduta.pdfIn PDF document text
    • http://personal.sut.ac.th/chantira/port/ckfinder/userfiles//files/96170862923.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=marxism+leninism+maoism+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_off0005484a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5484A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0005605c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5605C 17348 bytes
SHA-256: ac55f95cf325f6c50f76890ae7695da2021d8838657a07951b665dc3fac1c6ba
font_02_sfnt_off00058d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58D7A 10656 bytes
SHA-256: a7d661b765f47ea8dd2be7cd1faa2bdd1e57d48ac46257ec677f3b246d363c5b