Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e0f47011afc1ab0…

MALICIOUS

PDF

92.7 KB Created: 2021-08-14 21:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: aa08f6a1c5188bf02de433580e863099 SHA-1: 0fa830f265416674f408945fc9ee3e40e338566b SHA-256: 9e0f47011afc1ab03f535e31198a4d498ef7bddb517ab8393fb608cff9d216a7
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories and other potentially malicious sites. The primary purpose appears to be directing users to external, untrusted content, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e60a0d66ce---15577288601.pdf In PDF document text
    • http://le-bouquet.be/userfiles/files/xegosuve.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/61783808750.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/ffeca0f6d6a63f4b7c6c35de02b30127/24069311444.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/4d160b23192f9a741e6e85c783fbea2a/23485001265.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b505c2560---vuwefuseg.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/9e4c18c6a58e99a3d80d7ca072025377/26117610215.pdfIn PDF document text
    • https://anjingliar2.com/contents//files/12030165337.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/23072576887.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/jibixifonovodunode.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160755d9241f6f---49408750260.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/53818485045.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/90d38ada9d9c6eafc6a0449202196398/fewoponisiwinen.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/gegixogakasuseda.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/5566659500.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a79ce0a3cac---juvefuvajisaditoniwir.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ae9eef935---jegotagakebilavesotuvizo.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/ae0ae652b3cffff92ee70f9e5e78b591/31016462191.pdfIn PDF document text
    • http://atek-ent.com/upload/file/97097644763.pdfIn PDF document text
    • http://slhs1958.com/clients/18590/File/pifebi.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/74d44141fc9a184880b8cbb3cd64528b/xupafejixowu.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/03e8ec06eabd01fd232231be42388bc1/xorebejatekexokal.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/1bb730261525dcdafaf851ba73a9e705/bunufejarugevetenufu.pdfIn PDF document text
    • https://bonacorsi.it/file/5617659874.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=yo+yo+honey+singh+siftaan+mp3+song+free+downloadPDF 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_off000103d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D8 11300 bytes
SHA-256: 905bdbbe7be304dbb6403deef896a9239b5905f5eab2b654843441b947ed5c44
font_01_sfnt_off00011e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E18 17536 bytes
SHA-256: eede84990491a0a18d34eff45a11c7caccd544acf710c6d35f5698f0adf544fb
font_02_sfnt_off00014c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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