Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a32cb39ce5268d0…

MALICIOUS

PDF

84.0 KB Created: 2021-09-01 07:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3004ce1af64c7eb1e7068deef3133c47 SHA-1: 109c09a22756f78fefc4103fde0bd4ff5dfd9666 SHA-256: 2a32cb39ce5268d0d32b13b8213c1e397b41fcd4a43f9db5814d5332bd568229
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, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains a link farm pointing to compromised WordPress upload directories, suggesting it is used to redirect users to malicious sites. The presence of numerous unknown URLs further supports its role as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608506dc252c2---16005727708.pdf In PDF document text
    • https://cqhuaan.myhost360.cn/upload/files/08-29-23-30-09-17.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/lrahpnhgit6ehr0804i9p51eaq/xofajevetiwoxademezok.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f142046d1d---67687635800.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/mojimemo.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/87r8p0j6in1oed1o8sgd2tikpf/gitarigulinowi.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/zobevutenunud.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1570fc4b31---16289438042.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/7ae7a0813a2a3cfb86f9baf915ff3504/dolofademosinexizal.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160767fe3c0e75---12157486435.pdfIn PDF document text
    • http://korsorlampang.net/user_img/files/7835939230.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddbc63a2831---besuvaxise.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/d5c2505c0300f775936b48e5555f7c84/fulid.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16084a7cd9893b---juxukerogepuri.pdfIn PDF document text
    • https://transport.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/wunedalepuboxo.pdfIn PDF document text
    • http://wallacewilliamsfamilyreunion.net/clients/6/66/662ca4338cd1fa41fa93b88222973dc6/File/63718670342.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/fa378b73d34b7d5878c0b8bdf8e8a0a2/10501025138.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/11339280133.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609e72ffb49ee---ramowovakibijitewu.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/mositazalulenomit.pdfIn PDF document text
    • http://lemma-studio.pl/userfiles/file/11844653354.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/46556362792.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/c5087912c38f77123cdb9b2aae4f3e40/mijugexajufedu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=thorn+in+my+fingerPDF 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_off0000e6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BE 10264 bytes
SHA-256: 78bf7795c036844a49661cf8e3b4d3fb9909d6ab1099e17a1b5353ed94ade98d
font_01_sfnt_off0000fd97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A9 17496 bytes
SHA-256: 660403fc4be8138462bfbe57ebd4382db8071659fb9541c7f99ffd4a6ac0debb

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