Malicious PDF — malware analysis report

Static analysis result for SHA-256 1261fc7a8eabe520…

MALICIOUS

PDF

99.5 KB Created: 2021-09-02 09:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d87278af862914b0f07d3f9311eb5e54 SHA-1: 0175d8a28258002cc38611b3bd4d5b1ba9d351ef SHA-256: 1261fc7a8eabe520f18c2973d8a3fef7006a8f6ad0871142f9ecdaaeabe14231
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites. These links likely serve as a distribution mechanism for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9880

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 https://huntic.ru/uplcv?utm_term=role+of+students+in+existentialism PDF link annotation
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49a208b2fe---33300762515.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0cdcc6b45---2773815232.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/5af9555867fbccb80f149e19703fe39c/91737129796.pdfIn PDF document text
    • https://casadko.fr/userfiles/file/xijuzaxidodutifu.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/gajogofedijigidubopoji.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751f3dcb5f8---90932707893.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/zemozupuwewodaxaguwabidi.pdfIn PDF document text
    • http://slhs1958.com/clients/18590/File/48698815823.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/7811594239.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/30202589644.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///dolosedededa.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799f7069cb2---68562837733.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/mibuxefaxefetozaf.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/18002171516.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1608f67d34ffb6---88253388857.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071002de8a52---tetelagikuli.pdfIn PDF document text
    • http://kiuanai.com/userfiles/file/bunepipejawedizadugezo.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/534af704a16e3632ba0c17696824da59/353268657.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/56d2b1790bb8f55c14906955d6a86429/47505113554.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/kowasunuxegupe.pdfIn PDF document text
    • https://pmms-online.com/assets/file/jewexulun.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/35077712538.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/79872170499.pdfIn PDF document text
    • https://10glazsikeyrosa.ru/file/69299883702.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/xetujasuluvidapo.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/bf8ae2dccc188b51bdc1f566f900d8dd/jusoxesewenubuke.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/de8e87fd5c441af2d3e3334c5c8e365e/luxopemagorisilolu.pdfIn PDF document text
    • 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_off00011bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEF 10664 bytes
SHA-256: 230f598a504a1fc206eeb9071bb1be85ce30d1b7736cd56acdb8241a5b7b99c8
font_01_sfnt_off00013467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13467 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C79 19900 bytes
SHA-256: 8081725c94f4d07e732b27312ef66f3fa110a499ccf8da06fc39b9aa0bbc0d93

Open this report in the interactive analyzer, or submit your own file for analysis.