Malicious PDF — malware analysis report

Static analysis result for SHA-256 745bedf65d04f27b…

MALICIOUS

PDF

150.5 KB Created: 2021-07-04 01:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: cd2be8878fa5ad2d05086f33b20cfa27 SHA-1: 4339eebf443b4bb8f0ce8668b9582feb836a4504 SHA-256: 745bedf65d04f27b779d8cf8e9822dc0e9a5e0d5e634ff4461fd6114b2ba798c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/adc0136b8e795485a762fde7c92c2538/kojojevugizivepidif.pdf In PDF document text
    • http://hgbs.de/userfiles/file/temerajumugimu.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/722ef7900ae8ceef8abb43b0949ec4c5/xulilavezi.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b97c917fe6a---27562235021.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/75707517260.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/47671577249.pdfIn PDF document text
    • http://waypl.pl/upload/File/zavesewapotijisul.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/9j7anq2fvpeh7u2jvn3f5hrqs8/67767712415.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/jetluvh376f93bgmrt1l2v6ibv/28110578261.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/25816969108.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/88582737982.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609458d77749d---35716489422.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/tosevutawuvekapurukado.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/ljsns79fuo4ei9j5j4t6lkctt1/zilera.pdfIn PDF document text
    • http://home-delighted.com/user_img/files/18891467329.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/bujilulafiw.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/b4eda4636798f00f91ec81c0cfc9e2eb/wiminanoxugo.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/42e128bec131f828276b10566be63260/vuvasufujufenufibogoxo.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/39a3qocsj9d09b8roec6ndr44m/80420046592.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d9c3de2e5---62785624728.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c805183527---30035586585.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/64343f432a1cde4af360efaa6d6815aa/45685381327.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16079024be52c4---bokiziputirixilanozevamu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=the+incas+were+fromPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/ab919675a4dda86aa52c554e9e6c2798/ledasujomemasevazatilanu.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_off0001e49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E49B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001fcb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FCB2 10504 bytes
SHA-256: ca7e4adc3bce484ba95a85e1400111af38980ba237c8c16de5249e6c029b065f
font_02_sfnt_off00021475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21475 22608 bytes
SHA-256: ca93008444b61700a50f11af08f88cbc0222359ecc33f8893a311f365ba4ff6f