Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b133d80c9d0c0a…

MALICIOUS

PDF

84.0 KB Created: 2021-08-17 19:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 51102d346712728cace086b528670235 SHA-1: 545eb4e063fe28233ac7a333cad686e05019cb5d SHA-256: 47b133d80c9d0c0a29479e2bf1087b95a19717c41f07f7deff065324770dd553
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to compromised CMS upload directories and disposable hosting, suggesting it's designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing sites or download further malware. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or content-distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/71bb9f8690eee7f61062f361914c1a13/radelexigivanaxor.pdf In PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611bc14967dfd---kuxuxuzedirijos.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/53755958325.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/pekijunagegezogafebuzijok.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/dc62ba68076ce96aade957e5eccb95bd/28640596755.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/lojiradamizuxepalupurikul.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/76464253672.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210624_074946.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/magopas.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160dcdf40eede8---62621712968.pdfIn PDF document text
    • http://aweibel.com/Photo/file/46740084084.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/051d1a5b22625f833ef32042cfc6dc44/volabadidunonopabi.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210810225352186.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/79629247217.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ee34a78d3fa---2353582137.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/buxem.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c0824f247---kugelulezunitukak.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/69066c28ce33f1b664cd1bd4db4901a8/85075785581.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/5872552012.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ac5c71821---pafunazepukaku.pdfIn PDF document text
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/91544658646.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab023590f4---jolaken.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd5e4d85a8c---31108659727.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/2hdk5t344u4vjtjv34dequoku0/bimafatupadoxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=who+owns+the+ice+house+chapter+4+summary+sparknotesPDF 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_off0000e0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D5 11056 bytes
SHA-256: 85675e558bec6ab4482a1d97b97ddd04bfcb7b12e7894963daa3c537b9e006c3
font_01_sfnt_off0000fa91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000112a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A3 18620 bytes
SHA-256: e5316927637658edb533e9e9144352ca5108d401a16ed4d8ee30ee569f0269c8

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