Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f0e2cf59a13fc2…

MALICIOUS

PDF

77.1 KB Created: 2021-09-05 00:09:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 726792394c76b9464341b1570a50ea43 SHA-1: 75fe6fc6cf9ad3b5e42478ba1bd7837aa1f251ab SHA-256: f3f0e2cf59a13fc2c445884cb7242e08b9cc2f20831312efb72886f6616211f8
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous URLs that point to potentially compromised CMS upload directories. These links likely serve as a lure to download further malicious content, aligning with a phishing or trojan distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e45335864c6---86758744121.pdf In PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/f94b896915e7070a1dedeb0038740ca4/masaxipabibeva.pdfIn PDF document text
    • http://integrotech.com/zdjecia/file/97513762419.pdfIn PDF document text
    • http://xn----7sbqwxdbhblh2h.xn--p1ai/data/file/dawabexakedixiwefafojumel.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/wuwini.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/j3ntv4q2c64u8vfbjshggibf3q/fuzozosudatabivomakitebe.pdfIn PDF document text
    • http://nkcophs50threunion.com/clients/0/01/014062e559e26c1cf0711bcec4e573ae/File/fovoripozilumaxenaw.pdfIn PDF document text
    • https://actor-conseil.com/files/file/kuwexeku.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/takajokanaxumi.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/gobebikime.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/63688307986.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/muvudo.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56a5824523---gaxojiwerevikonekoxogewir.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/xawiwavevam.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/fudalojepevuj.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c656878207---viramagufejus.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/patejizenagaxuj.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/53186806763.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/78263511049.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/duludetujukavexuseb.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/20569306337.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/m3cd257q909e1t36qbs8l8fsra/96075177384.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/32534644263.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=sketchymedical+2017+%28microbiology+%2B+pharmacology+%2B+pathology%29+free+pdf+downloadPDF 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_off0000c50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC50B 17152 bytes
SHA-256: d6cd69b32ad201076e820faa4db13ffac96177be60a27b686eaa31281f4d712f
font_01_sfnt_off0000f16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10986 11908 bytes
SHA-256: 0434c8c87692779f2fe0bb9f97595c0024ad4e905cbcb9e89d9bf96964f9c18c

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