Malicious PDF — malware analysis report

Static analysis result for SHA-256 5063b7d4d3c3f1d0…

MALICIOUS

PDF

85.7 KB Created: 2021-07-31 07:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 7e001113803a73fd5016f2fc5b7659c9 SHA-1: a26137df1df9ed6b4c2d74c7ea465acb0b92d604 SHA-256: 5063b7d4d3c3f1d0c637324403ac95756afa53060e199293c2e33b1f33c16a65
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable domains, indicating a link farm designed to lure users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are highly indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://shinies.ru/img/lib/file/72988167995.pdf In PDF document text
    • https://soudurelauziere.ca/upload/editor/file/tipugemekevo.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/e813a8574033c4b425663752a42fb7c9/88478743817.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16077a1bb16353---50015940553.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160afd32bafa62---37872656940.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/ce47fe215f2734273d7f7341b3b968eb/moxolelobumozedizebafo.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/muzidokiraromavumun.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/52901081586.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/6344841763.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/e4ca792ff3002bcecb977c91abe53eb9/mazixubavavuse.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/f4d6ccf8386ce1b26183e359ffdcdab3/butoduzotufederip.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/87394574422.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/5bed5aecc8109894a8619aec4919c0cb/gesoxefavukosopetamuw.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607583aa5bf4a---vitegetatoxot.pdfIn PDF document text
    • http://internationalnetworksolutions.net/files/In PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608319b3e8789---33132708220.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/5276f72e7fd3905b170bf9612a82389f/nugowovuwixawuwewadit.pdfIn PDF document text
    • http://from.ua/upload/articles/2021/06/24/files/38662239745.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/54689998553.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/6ecb8faf876b66db90f40a6da1ac912d/tujawexogebufe.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/viwekasa.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/5370d0d7b06db7f881da69eeb24175ee/poputijetowisenemebib.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/81134639909.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/756ab66980b2222db818cdbb7341d529/87790901297.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/10290811682.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=ezel+dizi+m%C3%BCzi%C4%9Fi+s%C3%B6zleriPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6E 16592 bytes
SHA-256: 93b1fc4cbb42e509f2a492636528d0f742bde0d92e182e902fcb9d95be1a5350
font_01_sfnt_off0000e4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C5 10608 bytes
SHA-256: 053453b4883303854deca58c4a147e5b88fff94afa75c498e8054ffa72dac83f
font_02_sfnt_off0000fc6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6C 19892 bytes
SHA-256: 626ccaaa09ad179e539bc4c606d90d3561a75da82ff117c5ef7955668e97deea
font_03_sfnt_off00012e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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