Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b66a4ae719da302…

MALICIOUS

PDF

93.3 KB Created: 2021-07-02 08:14:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 22537486726233d5a26acbe2a2828796 SHA-1: ff77c373c0c989283af7ddf5bc04bf12f532d6cd SHA-256: 3b66a4ae719da302e4cbd4a1dcbbd0545150235ad8d0c1a3c4b75b3610ddb914
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the lure-based attack pattern, likely intended to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smidgel.ru/uplcv?utm_term=magic+partition+recovery+registration+key PDF link annotation
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b6dd91c599a---zawubofajilodixer.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/67225a3b0c8044af9877ae497711c162/taxubopololakokozafezuv.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/14790282961.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/25b6a7defc7887f4d70bae18e8b8469e/repenemitafezijufusev.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fea886add9---dasat.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/gobajibubo.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609836365ed3f---80675284032.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609d37c0b032a---dowidazotavekazofudiso.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/bfc1d2e77218645b3e9be783241c0620/14370694316.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/e4da603b0d37e136384d2f5e714c81bc/49240771630.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/fidilenafole.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/fakevetajesemidabowejuzo.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/7289018817.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/kagixojo.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/38d1d80f29379b71e1f69f87f33d5999/mogusuzimisibumitoxudozoj.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160afaaf15ea73---lerotojevozifuvag.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/fbb66991017788e3eee952200fc81809/65891517258.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/8f5ec8804bf07e0ed2e96f039bbcb26b/92653989741.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/728caffbb4d2d11f085f67ad3791c4b6/49467651176.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6355cc5b4---kejetajexakitunanuj.pdfIn PDF document text
    • https://grancom.by/upload/docs/45613666742.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E2 10768 bytes
SHA-256: 25c49d5c6e80c60fac607d155e92770378f3da8ed6d964a33924ed2efe521de8
font_02_sfnt_off00011ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE4 18652 bytes
SHA-256: f9db6037ddc01802dd2e90dd0c669144bceca8c14cc596af6c14d23e750f9317
font_03_sfnt_off00014cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CBD 17212 bytes
SHA-256: 23c82b17e2cee7727d9fb2387cc7d15e5913c3d2e74e6700b0055d98a1aa160f

Open this report in the interactive analyzer, or submit your own file for analysis.