Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3e9d4f36b4d8e3e…

MALICIOUS

PDF

86.8 KB Created: 2021-07-07 00:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b66a47b8031e7aa98a709c4e91cbdb12 SHA-1: b8369c1fb6c40d7ed7b105a71cfd9ec2995fcb38 SHA-256: b3e9d4f36b4d8e3e381114c6976ef2f16a5dc16d09ea9ed879d43d9aee73b667
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish users. The document body is unreadable, but the heuristics indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16093d3bdb22ea---34147775430.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/bcc47e1081226a72eb40ac22bf895b3f/95412045510.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160985e7b9e589---sezuzeladixiba.pdf
    • https://walnutcreekguide.com/wysiwygfiles/file/pirugosarivef.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071871a18680---betowitibuludedevulufi.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a87dd6246db---wusivogijeluvorugaj.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607246b96aa62---27954773726.pdf
    • https://ntc-container.com/upload/files/tafitiwedozusazupavaja.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/b81607e36f0e529fbe39f2cb3a772e5e/79304196677.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb91bc800c---66853637566.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cab1b5cd94---batetopudixulololax.pdf
    • http://aep-tc.com/cache/fck_files/file/39614136706.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be6ffc9a275---gariwelufaporozaroramure.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/626a96fec6fd2a6f9dee0667eafa1fa8/34518548033.pdf
    • http://autodilykanka.cz/cmsimple/images/file/tukitakaf.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/a6476e1582cee2742feed89d363e2bb5/garalif.pdf
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/d0ofragu5kdpp8r9vmchgibh25/wagupidedojizebini.pdf
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/34800537082.pdf
    • https://szabobuszrendeles.hu/files/files/88382458791.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df61319a04---66596348042.pdf
    • https://glaze-metalart.com/upload/files/sivodakimukaroluvelo.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3b7f5c563---88381595911.pdf
    • http://zonazero.es/userfiles/file/tidoduzozi.pdf
    • http://usaoxin.com/userfiles/2021-6/file/tulasutokukizug.pdf
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/37165644504.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9897c2fcb5---sasidajogo.pdf
    • http://omonetach.pl/foto/ilustracje/file/51314238306.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=partially+permeable+membrane+in+plant+cell
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1c3.bin
01bba9158adc986ec6091a2983f495fc49517a424d96077c36296901274f2327		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C3 10500 bytes
font_01_sfnt_off0001095f.bin
d0facaf0e309314b857614a062198e3308df317a61430b797f2b014787af3670		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1095F 17060 bytes
font_02_sfnt_off00013552.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13552 16792 bytes

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