Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebfce96d2e486c3a…

MALICIOUS

PDF

78.7 KB Created: 2021-07-29 11:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6c94ad97ae7cd92e3d794e6d2472a52d SHA-1: 89d46bea4a48e9756754dd456b161d7ca6f82e1e SHA-256: ebfce96d2e486c3a333990cdb29a0536f7783bcaf9b50373263d667523440063
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains a link farm pointing to multiple compromised websites, likely serving as a lure to download further malicious content. The presence of external URIs and link farms on compromised CMS uploads suggests an effort to disguise malicious links and leverage existing infrastructure for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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=wildwood+tarot+book+pdf+free+download PDF link annotation
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/vbvk8ho8d6tbfpvhug4gmdn523/xeporarefeseseputujim.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/86533678168.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609023993c196---96374688161.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/33170620351.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/foxiz.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/e9i7r6sj89bd6mrfn8urtqgr8p/bumipulekidelibiva.pdfIn PDF document text
    • http://chongros.com/userData/board/file/jubosirenufijes.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/9agau52f8vah408crq49ovo2k0/xugijesopid.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2be1ee766---6837990404.pdfIn PDF document text
    • https://monyetjoget.com/contents//files/34606764648.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/11879698652.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/3a0c8b341c93e881452ed863b599cf3a/jujoj.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/75002246960.pdfIn PDF document text
    • http://hevolta.com/upload/file/bumoguxiturowogibava.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e67453c68d---xanofosevomunirepibobadek.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/21413473416.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754f6f3bc2f---puwodakewezo.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed98e66a725---wuwokuzil.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/03b1614c2318305651a364de4e22b539/22802608244.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/383100edb3ded4002e6bb8d57de01196/wejepegijazixakezirudeva.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16097be93ddc79---vusesuvepadizalirux.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/tirigexosewobufalufom.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/0b4104a31feebbb8dee36a259bbf7bd1/wupifuxo.pdfIn PDF document text
    • http://walker-doss.com/clients/4/45/450b4a4af5ff3f13851793278d9c7ef8/File/luxuzarumizefigiba.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/l9rrv8mmle0te3l6en18rni7oe/74859028519.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC5 18240 bytes
SHA-256: 2400fb5db3e5129267c20fea647603b7679cd90b437721a706c47f046468c8aa
font_01_sfnt_off0000fcd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114EF 10632 bytes
SHA-256: dce4f0b5ea43580d8d4b245dd8c0e9b25874ece40766bddca6a7ac845d44806c