Malicious PDF — malware analysis report

Static analysis result for SHA-256 96432ed3ddf58d0a…

MALICIOUS

PDF

79.8 KB Created: 2021-08-22 00:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 239c4109ed51a1eddfe8531e733406fa SHA-1: 96dccd8054d55679f6e6aeacbca88812d9be5867 SHA-256: 96432ed3ddf58d0aef875dbaa5eb8eb8886a1b827ae4a7663b89df1859e60005
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/uplcv?utm_term=electrical+engineering+drawing+pdf+in+hindi PDF link annotation
    • https://serviceservice.eu/userfiles/file/kasogejetawo.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160864821278f6---79058769873.pdfIn PDF document text
    • http://iberia-ex.com/images/blog//file/megarurek.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085846debd46---jotasomifuxasovisutifu.pdfIn PDF document text
    • http://oilandgaswork.com/userfiles/file/16148827918.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/zepuguwesaxegoposop.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/najulibupitipuja.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/bidonegokadikifagaruw.pdfIn PDF document text
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/pujudesamewapomaberagova.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/fadufovariw.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/5f8u3coa3mr3h7egjoa1lhv8gd/99106180661.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/53680135912.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/tuzumijusuwovig.pdfIn PDF document text
    • https://kawanmto.com/contents//files/vojimogukebegulaj.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/93923247179.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/0c75fd5c21186c0581bb2c8ca726cee6/virimesupudaf.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/60757352574.pdfIn PDF document text
    • http://aprt1day.ru/file/wuxakeb.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/10120355986.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d0b6e815a8f---nilafuxeperapilevoxit.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/vazedanepufebizisumiwid.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16074c127b2ab8---gogugitujovunuriw.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/ruxixojoneboninok.pdfIn PDF document text
    • http://irodori.kir.jp/files/file/vakamorabuxunigena.pdfIn PDF document text
    • 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_off0000d2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F2 17012 bytes
SHA-256: 8e60e1aebdd9f7d0afd17ac9ae29556caf8e6f20ba165820a5f8d175a973f6b0
font_01_sfnt_off0000ff5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11774 10680 bytes
SHA-256: 6a77b9379b1ff2042f20abbfade3eea92bfed15ff994adc6ecf4bbe54e20feb5

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