Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0c782676b8dee4…

MALICIOUS

PDF

82.0 KB Created: 2021-09-08 00:29:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ed8233169c003d624d124856a3c8f0db SHA-1: 9b2db4e44ba02b60bf3e7375d0f6d7d0fd389961 SHA-256: 3f0c782676b8dee46b54201567575b02a393c2e0e20ba7e8e3007e754dc4b09b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier also returned a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://rencontres-icare.org/userfiles/file/nisipepijixabilagipivewez.pdf In PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab805c38069---ganinatobuvufer.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/geroteliti.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/bokuwanorofozidamel.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/fokofuwixoxigigufak.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/3d8edd9a210bc49ea4d0c2225790ed47/rumuguduxetelikinurusug.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ff6b80c1f8a---woponiradamatuxan.pdfIn PDF document text
    • https://mimpishio1bet.net/contents//files/nawogibewogi.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/41303322321.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607da5545e707---55352537552.pdfIn PDF document text
    • http://sibmetiz.ru/upload_picture/51717388644.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/mhr2fh8i70gqg4o4eaif4gp420/50480778833.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608764d3b85fa---33520769473.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/29ae90838e4557778fb3868ab28843c2/69062456607.pdfIn PDF document text
    • https://sambelteri.com/contents/files/diliponamataxoj.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210714105745.pdfIn PDF document text
    • https://x-software.cz/data/file/bosuzin.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/bonaximurinatizemagub.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/1aedaff4071fcc9dc9a1978234232db2/favomuwusevijujas.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff90d6283a---sajage.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/10643075280.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/zaboronubizivojinitet.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160db53f647aa1---75774571186.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/wugoxuwiteketus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=redressement+double+alternance+transformateur+point+milieu+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_off0000db66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB66 17244 bytes
SHA-256: 623e82b72d24ad35cef9623c20d5875e8b31827b01a555ca4ca0232baafc57f0
font_01_sfnt_off00010836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10836 11064 bytes
SHA-256: 941c1ec6ca302df9acbd5144708247d1e81d640572c7c84952fbf3cc318e2fd8
font_02_sfnt_off000121bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1