Malicious PDF — malware analysis report

Static analysis result for SHA-256 51713830721225ab…

MALICIOUS

PDF

471.2 KB Created: 2021-08-19 23:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c37ebd7f2b469d4a312efd9992f7c612 SHA-1: a778aa273343679a071fc74a81a21e4fa8b308ca SHA-256: 51713830721225aba57c601fec203034b9320f2b5eef7e2f11cffd0434a92803
146 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress installations or directly to IP addresses, suggesting an attempt to redirect users to malicious content. The presence of these links indicates a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8508

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/fb53a1054c3b41edcf5c0ae07666776f/monaganenedinodofowitan.pdf In PDF document text
    • http://cosmik-kino.ru/sadm_files/vivipugutadek.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/fae3d0d0963b255243ecafc271a9d93c/kupobajefod.pdfIn PDF document text
    • http://podushka.by/files/files/gafukodubetozaludoxis.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/a134f7270a249161e22a9c7a36b8c4e4/75714592544.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/t2ql8mtq2jl167fbe8ov59si1i/55117381634.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/wagopokonobaxu.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/eddea0c2084f4f8e6505cb4d7213272a/58379498906.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/9493980851.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/7333b0forjlp0pr5i8jd0s50s5/nobojuzamerinulugoz.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fead9dbc4---15987989979.pdfIn PDF document text
    • https://handientu.vn/userfiles/file/zadiripugavufugikobow.pdfIn PDF document text
    • http://smit-electronic.hr/upload/datoteke/12650543441.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608afc394579c---42288220205.pdfIn PDF document text
    • http://myxroad.com/upload/userfiles/file///vipelibetetazusafaf.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/4tskk08hai7t10a11q6bdtpf7s/gejufujivebafi.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adcc95950dd---22895009797.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608f653fc6143---6014954279.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8958f63301---71542876682.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160aad1add4c92---zebiwaru.pdfPDF link annotation
    • http://www.tobywells.org/media/fckdir/file/36264579531.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b742b4a3f3---wakep.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d47b1dc3c1---33367954584.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076205acb34a---tononum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=canciones+para+catequesis+de+confirmacionPDF 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_off0006e97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E97C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0007018e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7018E 19540 bytes
SHA-256: 62abd5d0b2e40d1338a925a462f305be6ec729e45da1e577758c9875c0fcfeea
font_02_sfnt_off000731d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x731D7 11012 bytes
SHA-256: 0690534c969a46021400f5d3e223c93c4fe033f26ffb12fc1a35e3fe38691235