Malicious PDF — malware analysis report

Static analysis result for SHA-256 704d854d85d31298…

MALICIOUS

PDF

107.1 KB Created: 2021-07-05 19:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7fce0bddf608e61917477ea957050124 SHA-1: e3e5d9ebd50ae73ad7a6a1552b62222daf931d4a SHA-256: 704d854d85d31298cfb4f61f5f9fcfa02f8843ac38e0c6eca716f4cda409a070
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites and disposable hosting. The primary purpose appears to be directing users to malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce36f6dd83---xananobagotes.pdf In PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/ba9fofkl0arro2f612cgpvqf09/40221152048.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/zutuwozasalefakogobaf.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16085b4bdec75b---40324104249.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0e115df2f---26754831842.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/2059b347d0f3e863c27c2e3642ad3849/mumipegelakuvaxewilevuw.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/dofimaremirenajurorofopul.pdfIn PDF document text
    • http://clinicaveterinariasangiacomo.it/userfiles/files/28706512858.pdfIn PDF document text
    • https://bem-sa.com/img/file/fogexegeromipowevexozu.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7399950d6---57018136049.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/113c9799bf21c7febf79f238bcad4fc3/84830333899.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609844c7c0125---pezefubidorozunefajitumi.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847a92ddf42---xonatepolog.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160973e434a17e---walesifefinup.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/92568405894.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca1a4b1406---luzomuw.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/rosezevutasavejax.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/ojudatq85r8a1ojrt90psbsq90/xilowi.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/llbd4b9pgtqerq86sudi0fe5vv/21666870481.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160d652b69a9f7---goduwewuliwomukapuzas.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/bitugakenoxesikexujojide.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/5ac4034474b43e64ca6e3898466dcd95/88173824382.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/93633206174.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbfa7d3531---vewafujivexi.pdfIn PDF document text
    • http://synapseburning.comIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=the+ultimate+book+of+mind+maps+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_off00012470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12470 19084 bytes
SHA-256: 8584e3450a768274617bfa4dbf7efea81d5e13dff2ae60291c86b422414282ba
font_01_sfnt_off000155d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155D6 10956 bytes
SHA-256: 1705b114c7917abbf8a34e8680aa590133b0993b35912e85465e0d14527a8533
font_02_sfnt_off00016ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16ECD 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_03_sfnt_off000184d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1