Malicious PDF — malware analysis report

Static analysis result for SHA-256 747d6f3918c1ec31…

MALICIOUS

PDF

94.8 KB Created: 2021-09-04 03:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: eada0a83f6d91156d6d60643ef45af61 SHA-1: ba7a48b07d3f4158dfc5f01f01329f907cc7a6c3 SHA-256: 747d6f3918c1ec31cc95b52cab1474c77eae2e467f1fe7d8d3a2dd121aaa50b7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it functions as a link farm pointing to compromised CMS uploads and disposable hosting. The embedded URLs, including one pointing to a raw IP address, suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure and URI firings strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/e49f165a5a8e3a3dbbf70dbf567680a5/besalegitipazoda.pdf In PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1612e4ee9c52dc---nututoniwug.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/kdrrljpc33caic8oq3g61b1ai4/duseditaxeb.pdfIn PDF document text
    • http://icwest78.com/clients/67591/File/50036145648.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/5nr57joptev4nsg0mklu921iv8/vatibuju.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/3oq6bott1pa0gk0ck9mlf9b1v7/zixowi.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/72177087507.pdfIn PDF document text
    • https://jagamimpi.net/contents//files/31642556026.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/e3d374e53374246ededd71a94d6b13a6/67247571219.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16126af7cc622a---15846481114.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021050104582273499.pdfIn PDF document text
    • http://re-media.ru/foto/ck/files/konosaxipota.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c615ec75a10---55942825724.pdfIn PDF document text
    • http://www.blueoak.fr/image/file/subodenojelepuxo.pdfIn PDF document text
    • http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/0ed2c9e8ae8e0ca1f87e8be9b34c0df5/90852194630.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210707133858027.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b869a3e18d---vixovuzijuremipesinig.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b811155be1f---47712222474.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/zewogiz.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa92fc62b94---wefolixugusa.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/9a9c38d07c5b757b7c685a8b4ae715af/12199320187.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9add9da831---55281674059.pdfPDF link annotation
    • http://luluscafeonline.com/uploads/files/68837829692.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/34936449549.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/d3846a6c570a91618126549045d56b7a/3566259785.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/75530952532.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=descargar+pruebas+psicotecnicas+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_off00010823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10823 10992 bytes
SHA-256: e716f049024454f1ad05002aaa2f5962ef374f0b376e6da9191046f3fb39a57b
font_01_sfnt_off0001216a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001397c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1397C 20236 bytes
SHA-256: 5f66348110eb84e8107e2c9afffb1505479d6fc9dc28325b2f93094c50fbf7e2

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