Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfad394f616e95dd…

MALICIOUS

PDF

100.8 KB Created: 2021-08-18 11:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 813c9559e4e61a57e21c46d5622209fd SHA-1: 3502147110944773f65777a4470fa6d0b7ed708a SHA-256: bfad394f616e95dded2c6ae9ce2b15ad97b88389c607ac28e1c3d6b61c8f4f38
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://childprotectionindia.com/lexcyberia/userfiles/files/68914925680.pdf In PDF document text
    • http://d4sontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/zugosufujakirejulemiwiz.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8bf2a433ab---41908915633.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/785t2plpln08lmjuj0rh8u4uhv/nigoronepenetelefanuzifu.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/d5d6463ff28d9f699b89f6fd7a99bdb1/67433444351.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/3607742372.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f152f7b4b9---gobunin.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/duzira.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609252894033a---93227911856.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/66feeee4dcd3998617c34ebee09deda9/25944423696.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f6cd4a8f2---43313383400.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f097a0c48---tesuvivezujimigekesob.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/jemupiderululul.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/golitiponuka.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/barib.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/75475695789.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/4deb53e38d9d13398f774dfbebb9ca7e/34948695712.pdfIn PDF document text
    • http://busanpc1.com/upload/fckeditor/file/37077223781.pdfIn PDF document text
    • http://hillandbrownfamily.com/clients/76964/File/3100570471.pdfIn PDF document text
    • https://ip-pharma.net/data/files/rewojufototox.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/65300190397.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/6bc0e78ae73412d35a3440f3c02477ae/dosijugomolivetozowevon.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/c817a80bd4ad796046e9286fe9bfe9d9/10294649198.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/ladaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=is+mortal+kombat+xl+the+same+as+xPDF 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_off0001281c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1281C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14033 10460 bytes
SHA-256: 2cfab1ec89e89ee8cc988914d39e03174d9260dcb4aa8cf729a8ef549e9c30b0
font_02_sfnt_off000157fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157FC 17148 bytes
SHA-256: 726075bd1db55217eba6e8b9fd4f5ca515ecbd33be4e83bae3dcb1342bc3a270