Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d68342a6fc00352…

MALICIOUS

PDF

80.6 KB Created: 2021-09-04 04:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5ea012957d59c54abc88f137d8c62857 SHA-1: 945c028c238babcc34bd708a4607aae7feddb0d0 SHA-256: 1d68342a6fc00352514a6db6d388ed49ace4bb7bda4961bf7658adebfb2be1cf
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 document functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be SEO manipulation or directing users to malicious content, as indicated by the 'utm_term' parameter in one of the URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://studiobardinisrl.com/userfiles/files/forofofawupelumezen.pdf In PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/6282pjl2768jo4blrligal9014/31861089106.pdfIn PDF document text
    • http://rent2day.ca/ci2/userfiles/files/5277514790.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/esolkmriho2vruq4t0cpqo34p4/sukovepuwupuzumuxorew.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a96e3887507---35053580336.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3dcb20b0a---ximolitonupo.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/14695666278.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/13359625653.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d335b69f039---16915325764.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/manovosig.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/lejil.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/71071046031.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/sjd84t79ocko4u9ajh5d025g35/71542103226.pdfIn PDF document text
    • https://taiwancy.com/app/webroot/userfiles/files/bawaxifeda.pdfIn PDF document text
    • http://myboydfamily.com/clients/7/7f/7f513a2250c12de81a70a6735749c289/File/wojimuxibugig.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/wamizoderabemikusepi.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/95612876144.pdfIn PDF document text
    • http://tzsunup.com/upload/97592717398.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/58466735434.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/zixafofafalufoxagijixavuf.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/161135e0b6d2ed---54498051453.pdfIn PDF document text
    • https://quanghuydulich.vn/img_duhoc/files/14705481185.pdfIn PDF document text
    • http://www.kroonzuivel.nl/ckfinder/userfiles/files/fitisidokuda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=abs+and+chest+workout+at+home+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_off0000d4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AF 17620 bytes
SHA-256: d055b4a1214c78ed2719632e8ff7ad501fa97217fe6e2de5bc891afd29cd3535
font_01_sfnt_off0001027c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027C 11148 bytes
SHA-256: 3bef1b9298285b2b12a830167ce80c2411d4eb935e01b01807cd3173d75fa27a
font_02_sfnt_off00011c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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