Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f075a57ed847048…

MALICIOUS

PDF

127.1 KB Created: 2021-07-17 07:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7c82322ed08fdd030ce8b8a786f39e03 SHA-1: a01444072d7aa4cf735d5e99d5de0a4b1c696acc SHA-256: 9f075a57ed84704876b717e80df6a203b14c7e379bd09a490bb3c2247c4f3608
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are associated with compromised CMS uploads or appear to be disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded links suggest a strategy of directing users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9635

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://binarbaidfabrication.com/public_html/userfiles/file/87231389508.pdf In PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/b7c792599d65705ae31108400954be83/78610021485.pdfIn PDF document text
    • https://davaocarrental.com/images/file/xogabipodigogarajoguxize.pdfIn PDF document text
    • http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/wefavused.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/0d5d0e4155c41f8e8f91470151801706/dipokamuralilipesa.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16098c45770f4a---95739341671.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/3980445466098bbde04f60.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16083d00397596---30262430787.pdfIn PDF document text
    • http://zonweringbelgie.nl/ckfinder/userfiles/files/34204885547.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9debc9b658---34834805556.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/65f1fa7e62b0760181229e38867d106f/xowugorunilobu.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/9713204889.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160df36184a9d8---43402504139.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/85e3683175347ea387d65d6ee7807e32/buredozawogo.pdfIn PDF document text
    • http://dienvietbac.com/uploads/files/xorawanegutenaboxoxoku.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb2e352983---wopafu.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/49vl56nrs37amumi8av7p3df72/falodadufig.pdfIn PDF document text
    • http://atya.eu/files/file/girafaboxenakilewadotulox.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/60a825f25fdac19d8559f929e9c907da/jasemixedigikewugixowe.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/nj780t0o4cgtfv1o43rdrchrce/79923412919.pdfIn PDF document text
    • http://educationexplosion.com/clients/a/aa/aae59ec6301d25964842a0067e0ae100/File/xosamanotawugonesekudus.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b39e5b71671---766388472.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ee71d4c36e6---voxafemafozu.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/9818561938.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/db4664d9933326c91802daf7abc46501/14851350834.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=opening+chord+to+hard+day%27s+nightPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2E 10920 bytes
SHA-256: b40f505851edd70cee51b24ebf3aa5b061ba6c86426bc00e95dabc1ed4a6f747
font_01_sfnt_off0001084e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084E 16160 bytes
SHA-256: 27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46
font_02_sfnt_off00011dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBF 50592 bytes
SHA-256: fd5a8b21d2294aec1ac28e85ef513e9923c6139b31a0aa7a439cd783d3ac500a
font_03_sfnt_off0001a762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A762 17100 bytes
SHA-256: 5f1454b7f57f53a82cd998ce6f741186031cbcfd32b6b8d66db5999fd22f84c9
font_04_sfnt_off0001d3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D3D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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