Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f123f3de6cc8cff…

MALICIOUS

PDF

204.1 KB Created: 2021-07-08 16:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b60767b058839aa3be00cb81f4118e7a SHA-1: edbbe9ff42b3e490a9e7eb92b72f8a7cfef41e69 SHA-256: 7f123f3de6cc8cffcb67d56e63a7dac63ef44538417f7964b68117a808c26313
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of external links and the nature of the heuristics point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 5

  • 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.
  • 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://chcial.ru/uplcv?utm_term=check+mark+in+powerpoint+2016 PDF link annotation
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05b382bf94---jepegodadudur.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/46f097cbb1877f5935af1831e138d1e7/34053922682.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f554d0d629---zibopasexurowixek.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d49aad13b---valamakigezor.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/19950994161.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/73cd33ed599508f3d2fa1ed407b5775f/wemowozip.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0097456830---81051294867.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/e1678dc1c031a590fc814484db4b11a8/nevom.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/godawiwok.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/47398130556.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/0e93bf22e18e9c5692e12d62c1389104/35093506625.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2675b878e---susopiwumafad.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0a6bced76---41146324537.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc7bf440d1---turaso.pdfIn PDF document text
    • https://drlanda.hu/user/file/93328148084.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/5917a00a697e2403b7612c7a749515b9/85636314919.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a945df23fd8---28143159287.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/14243316293.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160932b47b484c---nozut.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/d41fd6420e6d3426a9d0115c052ad7b0/bozafejafivos.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bbc8dd6c36a---74008119457.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/97986116042.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/bgq8cl2c13cdsgevfmuepellgf/zoraredaxabafax.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/gufep.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/dabumovenidipokotonedaroj.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/143bd561ac65c42e509542964fc669e1/pelebaropalosilobolimiso.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_off0002bb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002d317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D317 20020 bytes
SHA-256: c60aa346a76e804c2cb6998006c3ad63d080d771536b0e5e5b7a6fc35630c10d
font_02_sfnt_off0003083d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3083D 11096 bytes
SHA-256: b5fcfcf885b6cb86adec650655203fe0573ab3ef9cb4210390a5ddb45ec804fb

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