Malicious PDF — malware analysis report

Static analysis result for SHA-256 506c38efcd3f107a…

MALICIOUS

PDF

83.9 KB Created: 2021-09-08 09:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1ec011088fd3d53b96bf8cb36aa65e40 SHA-1: a9ca30298faba0c83ceee26a4ed8e3fe496bef5a SHA-256: 506c38efcd3f107a5f50967e2ae351c00187f014a667d342fda78b59a5593a59
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised websites, indicating a link farm designed to lure users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as phishing or a trojan. While no scripts were directly extracted, the nature of the URLs and the 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristic point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=indusviva+business+plan+pdf+2019 PDF link annotation
    • https://simplehome.ro/ckfinder/userfiles/files/wazimuvitabatixateka.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a0ff2b814---69044352448.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/rimuzetozorepetofag.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/96c0c799e6cf27906a45d97c5979a82e/bajibo.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1d2a91134---guwekusuzolab.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf69ada1ab---40832821130.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210605170004.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/diketobowagosusafutiko.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/vetopadonatubokedigi.pdfIn PDF document text
    • http://allasclub.com/campannas/file/7288756381.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/nuvalisawez.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/m7rhnbage81mcum466d0ltip1f/xepawiwugapude.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/hiiotjli4ti5d1glqee921tqcn/disajofusekun.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1fb7cafc1---66750254443.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/51157196583.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/goxunok.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/b0eb114f3ac08804373687e416c74e0a/nupedatevemebulufatasebu.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/20408973271.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1611ba321698ee---25181113759.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/pidozodavir.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/4n7vre3i8i484dfspq7u2kac10/78663345044.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160940d5c0873e---55010604898.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/bixigatasowa.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/xafosujamikowafopasexefi.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/nudekalexevuta.pdfIn PDF document text
    • https://www.qualityitalia.it/ckfinder/userfiles/files/27387268504.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/mapesa.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_off0000e329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE329 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB40 10892 bytes
SHA-256: 0304e170a95d8c9efae09bd49f8e68b5bafc2e4325c06baa9e0ade960f4db0a0
font_02_sfnt_off00011468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11468 17484 bytes
SHA-256: b1a974fd2c65776b13148860131a6f12cfc8e22296dd43dd65906894754a4af3

Open this report in the interactive analyzer, or submit your own file for analysis.