Malicious PDF — malware analysis report

Static analysis result for SHA-256 888de85705383e60…

MALICIOUS

PDF

82.7 KB Created: 2021-08-23 15:29:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 94d9d40fc0bad93f4019b767fe4eccf8 SHA-1: 664c9b643248804c914162b00df993c91d1db02f SHA-256: 888de85705383e6007180a154db8b8dc1367b92646d7fe859569fb97bb32da6d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URI links and link farm indicators points towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/62a9fd3be7aa0e978e183ca0bdd966ad/mamifumuletegiwawilifovib.pdf In PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/fojanelasenex.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/98258675297.pdfIn PDF document text
    • https://performanshost.com/calisma2/files/uploads/46871381596.pdfIn PDF document text
    • https://meccanicagambirasio.it/file/3641267097.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/bd4391c032209e9914f795369fc3d9fb/96472103332.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/paxolilitojipeda.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/semexejamuwolaz.pdfIn PDF document text
    • https://hgqq.hk/tony/churchofgod/ckfinder/userfiles/files/fijigiwiwexebepewikoler.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/arnpqj9gqu7pnarh08pu1jsoil/bunazedatab.pdfIn PDF document text
    • http://asfalon.com/__files/file/zibutogumeruzugapaguku.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/joduzuwedutokasojimujaxuk.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/xilezemiregorowefi.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160772602acc0f---giwujokanuxapise.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/366oqrgn3silbtssk4qgrjv0q6/86392551903.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/vapisevilosurojawafe.pdfIn PDF document text
    • http://vlajkylevne.cz/UserFiles/File/tipuve.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbce178a70---94312065779.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a43cbb80808---45466444692.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098baddf085e---81784906369.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/14130745747.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/42652494988.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/4fb3b8fd2cec7f046dbc44d0e10a5405/49424940005.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/dilupufikef.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b46a508927---sedesukozezivibogodilup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=fundamentals+of+differential+equations+pdfPDF 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_off0000c7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00D 16896 bytes
SHA-256: 9a80ba9d9e7cafba804ac1e3e68237286f98c94e53531de5a71dc868250cc076
font_02_sfnt_off00010bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFD 10884 bytes
SHA-256: 4e0c88a911909527af873f833c87c9597baab4a49e1eebca2188af94001f8086
font_03_sfnt_off000124d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D9 16160 bytes
SHA-256: 27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46

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