Malicious PDF — malware analysis report

Static analysis result for SHA-256 9468995e69554d0e…

MALICIOUS

PDF

97.5 KB Created: 2021-07-21 13:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 372ee251abd3f4942d00c3a51ed39795 SHA-1: 967375cb2f4046810caf655fbdbcf09867955d2d SHA-256: 9468995e69554d0ecbae6e7cac97ec459bdaa5d2e8a3843e540a82a474fa58cf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites, suggesting an attempt to obscure the final destination. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9881

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/cumorsk0cs4rm6l7tqmk9moluc/xoxor.pdf In PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/d49aea18a52d02c575f9a9e31e2d3f6a/35244322613.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf21ce2ace5---bikono.pdfIn PDF document text
    • https://begili.com/uploads/image/files/64484663699.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/99702651c763b4d16a3d0b014af2857f/xafowunapi.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/0d4876bc51771237e590356b7960dc0c/davafi.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/juxuwowimosuxepaf.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/tapowawobotodip.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/1902297fde235f9c509442c686db6a39/borirobag.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/toxojamoxogatefuluxopupe.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/38521724789.pdfIn PDF document text
    • http://rafaelokazakov.com/file/67604947203.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7effeac40---voxegi.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/8143618582.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776c289833c---dufefovixifimawujigo.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021671017485769.pdfIn PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/zogekomuzejozipogos.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/59297831086.pdfIn PDF document text
    • https://europawindow.com/app/webroot/img/main_content/files/66660328964.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/siguwakuzilidakinugoli.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/4ii5husn3hf542dasc9e1nm3dr/mowamiwelezejurugo.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/januxivigo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=fire+red+mew+codePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC4 16504 bytes
SHA-256: 723bb682bebfb614e0ba3f9187d27e1b95381a9af7f92499cb2cc6efd57cf0d4
font_02_sfnt_off000125ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BA 19040 bytes
SHA-256: 62a11bef47cd3b9842bcc876a7f1cc4ec550e88780976ec1e58f2e36ace34d4a
font_03_sfnt_off0001591a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1591A 1976 bytes
SHA-256: 642591b3f9215a89dd736ce6b164e6530aa5dfadbcbee95c8eb971b6888c88bb
font_04_sfnt_off00016216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16216 10016 bytes
SHA-256: 1fb9c91598f3a2041a51fe53928d533c94277e5569b6b6d8389958024346e36b

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