Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d4e1460f1c29d8…

MALICIOUS

PDF

124.5 KB Created: 2021-07-07 12:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: e801d03605122be4bcc1dfda07b45452 SHA-1: 2664a2d62bc288d868f05ac814971792e2c0ef89 SHA-256: c9d4e1460f1c29d8d4b562d1a1bb97eb0107dae4b0aec55fad5a34b122e7a5ac
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

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
  • 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://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/9897ac9db0f5a174fd4d7ecd00e4ac73/43663828357.pdf In PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/36708421257.pdfIn PDF document text
    • https://pasarantogel2.com/contents//files/10807627936.pdfIn PDF document text
    • http://zivotzaokny.eu/res/file/jerurewiluvusub.pdfIn PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787f9598718---pufusebok.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/4516842695.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/6bcd59d5d198202a1021a8b847c41192/rukukariletabuvokunumin.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/7f67fa2404488fc2d70c6db43b87c39b/68256290931.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/fba12d20c20e36bc6b7ef98afdaeed5b/79364956095.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160e12a1301b10---78606994815.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af5c77564d---bilemasam.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/9772258439.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/tuduqt5d5k0pe42igqa76h1kd2/85114672446.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a7789f4b410---jopaxogu.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb13c8c7086---jevuve.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b568ec22f0a---lulafozaroduwagagagaxeb.pdfIn PDF document text
    • http://qytbearing.com/upfile/file/nenagoluluxodif.pdfIn PDF document text
    • https://argumentua.com/i/file/57832737012.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/2858726947.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/77e0b5ca407a2dd811e071e97829ad7f/wadoxuwimi.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/72etir8prtb8fq69s1jm0nl2ll/fukodamobebolemavab.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/211ecf41a50d4e758e2df80a61734f81/67683232772.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/9f7p9bf6ofsivpc6e9qdc951l2/87875238665.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6ba30503a---zowigazagijaxiwoxupifun.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/sepik.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/uhj9dh6h6tanjadctmkrfbl0f4/95754656935.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160973c1580a79---redenudosaruvubo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=convection+conduction+radiationPDF 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_off00017e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E3B 10348 bytes
SHA-256: bb9e8d82e9fcd126d037451e7fae26dfd63f6e4ee910216e63ca4422a9e9e7c3
font_01_sfnt_off000195c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001add9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADD9 19688 bytes
SHA-256: 35066a0c1592ca77dd31dd2a8bc4991a3c7fee03e1c5cd67d325cc9549306365

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