Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e8a402765d2e7a…

MALICIOUS

PDF

85.5 KB Created: 2021-09-06 09:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d6b6863099f7f79293db007f1b51975b SHA-1: a387db4bc3c9baeddcd6c531ff1825ce7d0181fe SHA-256: e6e8a402765d2e7aa3cdd762521f477b963b9ab3d7b6c593f92e8e8560240ca2
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, directing users to numerous external websites, many hosted on compromised CMS platforms or disposable domains. The presence of invoice and payment-related language further suggests a lure for financial fraud or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://patanamachine.com/imgUpload/files/76017803629.pdf In PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/94283278804.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/5fb934f3c5d5127733ca1027c9b551ef/69628469630.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/458171605.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a97aebe522---59662501143.pdfIn PDF document text
    • https://juraganmonyet.com/contents/files/71396766937.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d70b16ab7---gezaxutanirimasamaru.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c25aae7a48b---23872406879.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16129d330262b9---6108441121.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/74atfjpvk4k4smvll2fjnevva6/99859653655.pdfIn PDF document text
    • http://deltastal.ru/userfiles/file/detokugigulivanamidiwojow.pdfIn PDF document text
    • https://bulgariapools.com/contents//files/rifidatigo.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd81c1c961---16953669224.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/9084062969.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/96534104941.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dba421b302---mobukupo.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/fvmf0miqqtamsnv5s7eq2vim62/kofuseditapixejunob.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/75636000570.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/530843143608a7a1988b99.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/19628870119.pdfIn PDF document text
    • http://spodne-pradlo-2bpoint.sk/UserFiles/File/86909434490.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/fanig.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/79a0483dc069e45c94a8438e007e7123/52837120700.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/mefivemuguvemuxozegigoze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=manual+capsule+filling+machine+suppliersPDF 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_off0000e88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88D 18248 bytes
SHA-256: ccce1a683cdd1169e731fa2142cca76dca4402f18cb88ab0ce034368e79baccb
font_01_sfnt_off000117cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117CF 10800 bytes
SHA-256: b087fcd5e2dc4b3a147d05494fda73c2eb2f37f5538d4e1c22807db9ab135e8b
font_02_sfnt_off00013071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13071 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1