Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70a315f5008ec8a…

MALICIOUS

PDF

87.5 KB Created: 2021-06-29 11:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4b6126e476206ed6158dd72903b48200 SHA-1: bc41eb0dee0119d5960d5f51781dc194f7c35e5e SHA-256: e70a315f5008ec8aa6c1b9efe6c71c0ddf4eacee750e764515d0b70f05381a75
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, directing users to compromised websites and potentially malicious PDF files. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa5d1d2b3e---4134299440.pdf In PDF document text
    • http://wagnerpc.com/userfiles/files/nexokiwusakol.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa70ed40003---fusadudowulumi.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/xugora.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a346ad8cbed---gutaveganonipufin.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a76de1f019f---basorifuwosubipe.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/wigesipuxedamusada.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4fc0b7f8d---31692921049.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c06b073da17---lawuf.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/66agtjalil7hi8c41cu5fnf3ca/ledediwepibuxugubat.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd7dc4210d---2597071914.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021060523500173499.pdfIn PDF document text
    • https://fultoys.com/userfiles/29562242997.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/c263ba65f37e78e0d77799cb5d846142/18893880885.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bf36214838d---81645691185.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760445a1c37---xodowiwovoxugemezifezosu.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/dof8md5eeheih7k2fop9mq191l/mololupibire.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/kivuwujibezob.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/8qe1d1rc0utmnvjbro13at3qf6/59007066330.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/87222998496.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a1a4dd4a9---21969151191.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a18d4ce7b39---78599069004.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/92937073492.pdfIn PDF document text
    • http://kfbi.ru/content/file/88689733096.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=foxit+pdf+editor+free+download+with+crack+for+windows+7PDF 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_off0000f23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A51 11024 bytes
SHA-256: 36ce769f28549bacf9f64624805e139ec73d2e99324130fd2fc8ff5d4f9734ab
font_02_sfnt_off00012408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12408 17016 bytes
SHA-256: c895ee275168680575456974aa0b80ddde6ae20d2b6c65f1ec0aeb20d1ad9093

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