Malicious PDF — malware analysis report

Static analysis result for SHA-256 4560b72531bbb78a…

MALICIOUS

PDF

74.0 KB Created: 2021-06-29 00:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e0e8ff08c9c79efa8464991835491369 SHA-1: d71428eb6c884b3c3731b8aae43a58143a4a3617 SHA-256: 4560b72531bbb78acc0c9037b1b7ca815de4a758b1b54bbb7dc299e6d0200b69
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a link farm pointing to multiple domains, some of which appear to be compromised WordPress upload directories or disposable hosting. The embedded JavaScript likely facilitates the redirection to these malicious links, which are designed to deceive users into downloading further payloads or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://files.ibiza-ferien.de/file/41262448228.pdf In PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/51193af0931f38df4b799a8d95dfa0bb/towoxu.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/su4n83tanndp1onub0qj9tceme/fofes.pdfIn PDF document text
    • http://msiutilities.biz/documents/sawonasasavubugivovepimiw.pdfIn PDF document text
    • http://stylekd.ru/files/salevugixuwawazijunes.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/birilekakepemolepu.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/0ec5cf31428d6a75b6875c730b434f1d/6626847203.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/2fed39ca29de97a326fcb5f6c7c1ef0a/32310367146.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e91a527ebc---14791976266.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/8bo783ore77fc2pn3lve40pec0/38888527609.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16073a3c731b71---79197132934.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a510bd9e613---vagogozedidalalidu.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/63112430222.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/b9db3iqcf3794352l56ion8mjp/zejokam.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/jorasowowixewalim.pdfIn PDF document text
    • http://www.hmh.sk/files/articles/file/43345299580.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/33927706365.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/tmet6t3g4dvv0mhvlg7a08a0eh/17582920202.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/lotisibivugono.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/22704484837.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/adc4d4447a98a49ba382a0575b598603/65274684085.pdfIn PDF document text
    • https://progin.swiss/ckfinder/userfiles/files/pofulesebubebuperivigo.pdfIn PDF document text
    • https://fid-data.fr/app/webroot/uploaderfiles/pamufixusivizulim.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/ers54r3terq082c2ma8gls6qbj/47918240382.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/1413f804c5ed5f3b14bfff80bd3fad5e/89067800475.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160793af5ab7d3---zolivufobeperara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=gonzo+all+american+rejects+lyricsPDF 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_off0000c11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC11A 15956 bytes
SHA-256: 76ffac977d2ad8d87ea72e5d3d91bf52ce33909fa115cc42dc0c91ce9298f961
font_01_sfnt_off0000ea0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10222 10732 bytes
SHA-256: 2c51769392cc8ef152961987f2a30a7333ce727935b119bf16c4464fb628874b

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