Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e48ea0a33c78fd…

MALICIOUS

PDF

82.0 KB Created: 2021-09-03 11:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 9c2a2e1036c768aa3bb14154dc086c24 SHA-1: a5925de135d3b18879433563d0f5c1ce0133a388 SHA-256: 99e48ea0a33c78fdf97d606bec00faab8b1c161a3e9037f3e68a1fc91644ccf3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF sample was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. The embedded JavaScript likely facilitates the redirection or further payload delivery, contributing to the overall phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19934274685.pdf In PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/kicbuoh082l1hs2u7nq752vdb6/14136387387.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/61675707799.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/rodatopewezopor.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7e43d7c88---paxojedavawovedijaxemozu.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/4283884044.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/28229418174.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/f3b4fe135a61b82b695543a44bcee977/rofilirulal.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/zetuvosafotebudugomex.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/441680d35ae328e7f7fef72e848ae2b0/20903316957.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/ur1renuhm0s1qpecboq6f87h67/fekovisixonazadago.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/maxirizolelopuvezelomi.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/86666641302.pdfIn PDF document text
    • http://vaynhe.com/upload/files/39598343492.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d0bdc1c10---44244737029.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cf1876351af---xabakakadisajutoleg.pdfIn PDF document text
    • http://kisito.com/userfiles/file/tubufepejebavawusi.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/tetuv.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d4d002d54---22797419733.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/cd58af6fb81d7d2769ecbc1e5f69647e/tutirexegixudumex.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/2771616316.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160973915d0526---75501217718.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ef15caf28---21215042731.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/pivikakonidezodibed.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/44793578783.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/wigej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=badminton+rules+and+regulations+pdf+2017PDF 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_off0000daa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA2 11340 bytes
SHA-256: e3c8366dc05aa2080c7df8fbedc6a01a048b8029e76c5f96612e0281aa39fc04
font_01_sfnt_off0000f533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF533 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D45 17380 bytes
SHA-256: bd3acb43a4cc5560b5a446372f108ecbca021b719ef808f0a7f3a68f45220c5a