Malicious PDF — malware analysis report

Static analysis result for SHA-256 de0d38554c40d2dc…

MALICIOUS

PDF

155.4 KB Created: 2021-07-26 04:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8ba6fae98feaaab5e249ea0ecc6adadb SHA-1: 58d5ccbdf0d7c26ef99bf44ddefef1ef1ed0d857 SHA-256: de0d38554c40d2dc0aa4cb950574d3412a2d8bab727ed82b4a0ebac8f441046d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to lure victims to malicious content. The presence of external URIs and link farms points to a potential initial access vector via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/395b36e99fd5af210060d46834842be9/foxuvitev.pdf In PDF document text
    • https://deepex.hu/hirek/files/ludakazokuwox.pdfIn PDF document text
    • http://watsonwilliamsreunion.com/clients/82103/File/79038587807.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/btlu3f2s3b4tr86346hbt1c635/teladolowuzokejevoraxovut.pdfIn PDF document text
    • http://yi-xiang-yuan.com/CKEdit/upload/files/75639011034.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/3d39ae7b06157485a7f48be8a4bd450e/67906882927.pdfIn PDF document text
    • https://www.natursany.com//ckfinder/userfiles/files/wapagowazodopux.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160999e93d8ba7---50375596078.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/6b02dc2f271be2e0285350c2c84e8209/kirozene.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/91288h5ap4aunnoe0mjjoj6q1n/luxetenijiruduriket.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160d696adb9ef5---sagamerumuvavenezimomo.pdfIn PDF document text
    • http://vitalbafitnessclub.eu/userfiles/files/67029680915.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/iagpka8a4gehin6mnvo4k15ph4/sotubal.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/wexakelodifi.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/66071216721.pdfIn PDF document text
    • http://auburn-companies.com/userfiles/files/falapil.pdfIn PDF document text
    • http://beming.com/ressource/site-image/files/venudumobazet.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/butagov.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/tezevuxirametinenak.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/kefojivusomasaribo.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/c3076cb9515623ad8803c679f8ed1981/11484616209.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160fc307b7eabc---gafegelukiwekowajarure.pdfIn PDF document text
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/gibaberegesu.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/dupetoxalikaxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=%D0%BF%D0%BE%D0%B7%D0%B4%D1%80%D0%B0%D0%B2%D0%B8%D1%82%D1%8C+%D1%81+%D0%B4%D0%BD%D0%B5%D0%BC+%D1%80%D0%BE%D0%B6%D0%B4%D0%B5%D0%BD%D0%B8%D1%8F+%D0%BD%D0%B0+%D0%B0%D0%BD%D0%B3%D0%BB%D0%B8%D0%B9%D1%81%D0%BA%D0%BE%D0%BC+%D0%B2+%D0%BF%D1%80%D0%BE%D0%B7%D0%B5PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E919 11340 bytes
SHA-256: d3bafa9e5ad217d6dd9f29fa1b0ef11af6c9757db584122b4a67da52bdc1764b
font_01_sfnt_off0002035e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2035E 25460 bytes
SHA-256: 6198f4fa19946264968c19083e6f17caea649480a95787cf8ead09a9fe0fa9a1
font_02_sfnt_off00024309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24309 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1