Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb810236c209ca98…

MALICIOUS

PDF

76.8 KB Created: 2021-09-02 20:35:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 019b7d3f0647e026f1dadcdf683560e5 SHA-1: ae6106decd0ffe0f6d55c887b948bfdeaa0d2ee1 SHA-256: fb810236c209ca98ea3f7be50aaddae60c23ebe092823bcfcb207aa7b6a60f0c
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious by ML models and ClamAV, exhibiting characteristics of a payment redirection lure. It contains numerous links to external PDFs hosted on compromised CMS uploads and disposable hosting, suggesting an attempt to funnel users to malicious content. The document's structure and heuristic firings indicate it's designed to trick users into downloading a password-protected archive, likely to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/60d32334a29e3ad335bd4e947b169703/koxelunuvaxevitinorew.pdf In PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac34e5d04c---81453027519.pdfIn PDF document text
    • http://boxethai38.comupload/file/68794918189.pdfIn PDF document text
    • http://nemochem.cn/upload/files/47721125498.pdfIn PDF document text
    • https://dom-titan.rs/files/pogotegajazuxuloxu.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/ef193cb65f420c7d2d56e7d9eea553b4/wejuwel.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb2c0b910a---65008833134.pdfIn PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/dexuwuduronakib.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/18976247575.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/16078740176.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c63805944---zekezogevusinobafu.pdfIn PDF document text
    • https://hawkseyetravels.com/assets/ckfinder/userfiles/files/63003717957.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/fegom.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2e59f2df37d98d9c89ccdca45c889d31/49652694854.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/a4a36ba9cfd61557193e8d768ec68b49/21977532430.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16096e7fb79dfc---kexuvipidi.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/60d2fc0854b2300c7132e93428a76f38/meratusapeluzis.pdfIn PDF document text
    • http://melabo.com/upload/files/38836585085.pdfIn PDF document text
    • http://apisicul.com/userfiles/files/lokolodeben.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/filitojalotilebavijunodej.pdfIn PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/99396329296.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/de912e3f782c5ac401f4f776e98337af/64956950439.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=aiming+high+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_off0000cafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFA 10100 bytes
SHA-256: 9169b9a508e94fc44b0570af9f21736ace4c760b220021ca98725147f182e17a
font_01_sfnt_off0000e0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FC 17220 bytes
SHA-256: bbc70e6d5527953d41e4b197d4f0cb8009e2d8882309f12bf0954bd865274617

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