Malicious PDF — malware analysis report

Static analysis result for SHA-256 0868416b14e6129d…

MALICIOUS

PDF

88.1 KB Created: 2021-06-26 22:28:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: d84c0ba916d037297caa02265443ad9f SHA-1: b6e9612c47e2477903fbaeddda64ca159ee77cdb SHA-256: 0868416b14e6129dd1b26655e7dcacf85b121b3d09af5503e728831e4aee3e65
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/6fe680ecc5050e99be8fe91c22847c9e/wadibewan.pdf In PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/ac5ff077c3e3a4511addc1d592279261/97131888472.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/f879817c549c32d299005c3df53f401b/60551294763.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/5655277328.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/d57b1467ff77152d657127e0a6167afc/dusazulebonedajex.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbd0715e4e---27725704525.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/wijobufutujixili.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/bexilidexur.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/70017723917.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16081e4275a769---nibavasifugazir.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6035d2cc6---lunubikubavowerewogepal.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160735baf38de9---siwazitibejizuropitut.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce190089d7---lujagosaxizumosi.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3243ae952---55089534403.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/6342490737.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccdf9c7d25---77743519940.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/8beecad8a842be9c772bbf1e48262789/xaluwebiwojukami.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/82033548859.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/a66154ba8e939790843b9d668a0cc939/394834260.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/9921188826a93360e4f9ea3b75d0e394/62819197718.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160be96654607f---36284819767.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/3325scjlq4omab85gvv5ghj1s7/rosesuz.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/7d339433ae14fb17d77d6149996f9d11/90013942988.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/aii1vqt31bmjh8ekcbrlk0mkej/bomijopivaxamuzu.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/15225110612.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=bible+verse+for+youth+empowermentPDF 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_off0000f599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF599 17016 bytes
SHA-256: 0507311b897ef92544e46aed44ef13f80569e705b2308be9c8ff0235a4d59349
font_01_sfnt_off0001218d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218D 11020 bytes
SHA-256: 794c14fd34c151b34ee487697d2d2895c93c04b0123f2f0c5ab25fec183fd403
font_02_sfnt_off00013add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ADD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1