Malicious PDF — malware analysis report

Static analysis result for SHA-256 e62c6c32a45d4ad0…

MALICIOUS

PDF

86.9 KB Created: 2021-09-10 10:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2d33e642a3c119a13cc4f79381789759 SHA-1: 8a8640f7914ba8ce08200c7e961f8be36c22bde7 SHA-256: e62c6c32a45d4ad06f9f7216279c6ec09756117dcfea1cda8ae50196d941a160
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://mdteam.se/ckfinder/userfiles/files/26312845128.pdf In PDF document text
    • http://narcisse.sk/editor_uploads/files/84552287679.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613230670a54e---tomazituvesemulu.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613a86e4172ab---38377908825.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/girefeberokigedomivira.pdfIn PDF document text
    • http://balashixa.inhome360.ru/admin/ckfinder/userfiles/files/20873230778.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/300513e04a795a07d2e9d943c665574a/pupazove.pdfIn PDF document text
    • http://artattack-concerts.de/files/file/25762192505.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/xogosobigufedogovenomaz.pdfIn PDF document text
    • https://coffotea.com/uploads/files/202108311737365313.pdfIn PDF document text
    • https://fsbulletsandbrass.com/userfiles/files/68364196805.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/85387724587.pdfIn PDF document text
    • http://daiduongmetal.com/uploads/ckfinder/files/fekedipuwusiza.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/161396ffacc645---wemojeforekaligupidi.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/pixakexijobuguraf.pdfIn PDF document text
    • http://nayyaralidada.com/alpha/ckfinder/userfiles/files/nazaxiwibobisukeb.pdfIn PDF document text
    • http://japan-railpass.info/images/blog/file/64346893470.pdfIn PDF document text
    • http://aspbae.org/userfiles/file/jinivagolowakod.pdfIn PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/zobesositamugisesalu.pdfIn PDF document text
    • http://yearbookplus.com/uploads/ckfinder/files/gejaluzedowopanakam.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/34006619436.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/d1fd4dbbe5c37eb7d810469c0c0c410a/21987183634.pdfIn PDF document text
    • http://resheto.ru/users_images/fck/file/piket.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/dff9ff35c447f4f966a08f926572b762/35787236792.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/gowonusaxukivolatobir.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/063698c0008d6d71c8a338eb5f101062/benatukirazidebi.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/80280249007.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=t+mobile+prepaid+plans+keep+numberPDF 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_off0000efcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCC 17316 bytes
SHA-256: e080d926f73759707822c45d304e95306014fd54317c45c3d7252c9db696838b
font_01_sfnt_off00011d19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D19 10748 bytes
SHA-256: 03c7fb0f7366f34fe4808f76ce9de3734c0fd4c7be5e5cc3c652ec2f4c191906
font_02_sfnt_off0001357a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1357A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1