Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a5d2e7edcf6803…

MALICIOUS

PDF

87.6 KB Created: 2021-07-09 05:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 24eaa0cb94a7d429dca3972951a83730 SHA-1: 2b7eedc85d64fdf292ba28654790c276c26d8794 SHA-256: 09a5d2e7edcf680329b18aeaa7a5d5fb1c22b669f1aa5c877929242e566a1b17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Several heuristics indicate the PDF functions as a link farm, with many embedded URLs pointing to potentially compromised WordPress sites or disposable hosting. The primary purpose appears to be directing users to external, malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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 https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/c2v650nsqbjk93a141e60p3p6h/81817528761.pdf In PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/3c06a83722e06d3a63664f6f5062d8dd/runanekunukemagifogako.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/rofod.pdfIn PDF document text
    • https://ka-base.no/images_content/file/12263153905.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/51725445523.pdfIn PDF document text
    • http://umiyawoodworks.com/fckdb/userfiles/file/dokefefunupenematoz.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/71839455122.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/joxed.pdfIn PDF document text
    • https://pindimana.in/uploads/file/57798973228.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/zisazazuzudugadavub.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607b989dd2f8e---9793763834.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce6f71011a---73408849071.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210629_114744.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/duwanasalovafawawumer.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/reaejdkduaijockvil2dkqskbc/89206890024.pdfIn PDF document text
    • http://allycatering.com/userfiles/gurijejefixeselodegaz.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/feb2a0c8e9d135e4c3e70e6a1f43dfbe/xovefimajimepanuxad.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/gulogut.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/c9def823953fb6dd0525eed76e6897b1/91873927386.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/54415153076.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/bd90c2fdf423d4944c9562d70db6fdf2/letofawuwazobapom.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/rabivupiditomodabawu.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/semofagos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=what+does+the+term+wet+meanPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45F 17788 bytes
SHA-256: 63b18b1e6bd121f08a9e1c8d6ff6dedf34738cef8026fbfb20c02b2822faac5e
font_02_sfnt_off00012320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12320 16244 bytes
SHA-256: fddcbe21bdf9fb2753729b4ab5b26d7a3fbb01e3fe51d41ab0725360e25c189d
font_03_sfnt_off0001390f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1390F 10456 bytes
SHA-256: d6a292ca4ad86faa9cf92e6cf32c19b1275b4b5ee3f9f6d3e9c33cccc33a374c

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