Malicious PDF — malware analysis report

Static analysis result for SHA-256 442f476c02bd017c…

MALICIOUS

PDF

74.5 KB Created: 2021-09-11 08:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 30914338987bd36a9015f6cac507ee78 SHA-1: 86cf7dddba0b0b849cbac5c40fbf930dfd75e44e SHA-256: 442f476c02bd017c53610ad9839266735ccacd1e5b4e4c445700fb3aee69f312
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to disposable or potentially compromised domains, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.radanhorse.com/resource/files/fanapenedob.pdf In PDF document text
    • http://cbgnfinance.com/userfiles/file/joginamodokonodolur.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/19685110166.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/baditugofudavuresipikiba.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131988114321---betol.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/bisitulobowawolivixuzuseg.pdfIn PDF document text
    • http://duocthientam.com/uploads/ckfinder/files/fenefa.pdfIn PDF document text
    • https://ckeditor.pamlskovnik.cz/ckfinder/userfiles/files/78637019041.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/zunosotugim.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/jumaneroxapisutapa.pdfIn PDF document text
    • http://djpress.pl/Image/files/67513892252.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/58133714105.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/df43e303cc9597924316190268d25fc6/19095348497.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/41794144336.pdfIn PDF document text
    • http://mackyz7automotive.com/js/upload/files/69106356644.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/luginaretodo.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/a40cb33234738beb8319f83ff79bf77a/fifidifuridibijewo.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///14625085701.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/59412305976.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5075584717.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/53961051645.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202109/file/24404206155.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/92075450472.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=brooklyn+nine+nine+season+1+episode+1+onlinePDF 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_off0000c174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC174 16452 bytes
SHA-256: 17a1c25f304da3dbb3982da6db8c288bb485fe65c921d7f58aa230493552698e
font_01_sfnt_off0000ebe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F8 10600 bytes
SHA-256: 47d41cf2523172c953e41a568e3c782ba0f1a76d8550178d7d12cfcf84fba018

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