Malicious PDF — malware analysis report

Static analysis result for SHA-256 2290e86360d7bc3d…

MALICIOUS

PDF

60.2 KB Created: 2021-04-29 20:36:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15419fa3f091395172defdb7910a200f SHA-1: 847143c64e5a9f0c35ffea2b24d325f580937663 SHA-256: 2290e86360d7bc3dc318c9056c3ffcbc2af8327f0cde08519431af4d748a30f5
154 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress installations. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates these links are likely used for SEO manipulation or to host malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, suggesting it's part of a phishing or trojan distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8151

Heuristics 5

  • 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
  • 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.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084a9379051b---23816886483.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5d37c79d3---55392547450.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/b7876ef2e1ad1e4effd9920850aeba01/datofijenedukebal.pdf
    • https://evboosters.com/wp-content/plugins/super-forms/uploads/php/files/65c6de243ebd8c6ef28406ca88c4503d/lokiriludinivotazuto.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d99c9fabb---84113415756.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608163865af0f---pekovesopinebi.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/f7c38fd08bafb4e00f4a9685ccd4f2f5/70762696797.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a95e515bcb---minurasibojaruva.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077dd0755ff0---51272141699.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/r3eq2h9a42aamjm4vme8trlr73/39791501465.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607918732d474---29782100547.pdf
    • http://poorclarescork.ie/images/8136139304.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849532d0fff---resimurasijufedoras.pdf
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/0800aa3a412e33deb151d8de3fc09287/savinewopefodavovasatu.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/ab17a926980437c5833113df1397986f/52594009187.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff21f4cf15---vojonusafanululotezipu.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fbc1ed644---tevafirigepolovuxawadodaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=casate+conmigo+bachata
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d228.bin
1af6fe9d433027dbd5a50b15f9fad7ec9c7f2805ac5ea8a582cf90b78123215f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD228 5132 bytes

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