Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30aa1526763ea73…

MALICIOUS

PDF

72.3 KB Created: 2021-06-30 05:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4092711a34564296e86a5f37fe0bf1c3 SHA-1: 61746807506ee44fe57bb0dd34d88f628159c9ec SHA-256: d30aa1526763ea73aad0da0ba594f8785a30d7744f1ab9ca88483fa0f0a51628
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Multiple URLs were extracted, many pointing to compromised CMS uploads, suggesting an attempt to lure users to malicious content. The document body was unreadable, but the heuristics and URLs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://autodilykanka.cz/cmsimple/images/file/jiwoz.pdf In PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/fa0fb824538578ec0b35989d3b24cd55/6189974537.pdfIn PDF document text
    • http://www.77ice.com/upload/files/77286271796.pdfIn PDF document text
    • http://compufoxmail.com/userfiles/file/mekolin.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/bsjob744s0g1cr9mnidro2e7i7/55141311111.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/balabezaboletazov.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081323dcf2f9---wiboxuzidurex.pdfIn PDF document text
    • http://artpolyclinic.com/file/files/75557738491.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/qtt61rohalqlue58dgcun1voqr/48955974525.pdfIn PDF document text
    • http://change4best.ru/upload/file/vupitoseranatawi.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/j4ndtqu95nmt2b9bdkup0mgldd/derapajaxeg.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/2760295a26ab34435f40b00e0040f26a/felugirovapava.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d364ba2c6---pifuvudamonetuseja.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/76113621817.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2edcc8624d---wibefawuvexixilipege.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/sorovot.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/6bls8p9ci6rrp0v5r2engmmae4/38615580769.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609329f744ce3---88065178452.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608706812a992---89464722676.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160890587d78c1---89045512460.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/wuxawagaxerefexo.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607255c6a994f---mudupalisisuguberusar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=chan%27s+chinese+foodPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D5 10396 bytes
SHA-256: a9ebaa69ae3b9d1546b54b8954f59eb54f5c428c2b2d557d873c947fbaa1dd76
font_02_sfnt_off0000e853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE853 16368 bytes
SHA-256: 0a005100c52a3d72b2ff454bf2d721ef3d45fa9ab070d0297f848b0d169b129b

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