Malicious PDF — malware analysis report

Static analysis result for SHA-256 84d06bd575f86305…

MALICIOUS

PDF

70.9 KB Created: 2021-09-02 22:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4069610457761f9c300559e7a3ead2f5 SHA-1: 248ce1f9a28bd0506c1a715861a188c1d411fe9c SHA-256: 84d06bd575f863050e5d3e5e13c71fec20702960794910b48fbac547b90c3951
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://pattarasawat.com/ckfinder/userfiles/files/33624393390.pdf In PDF document text
    • http://adveotec.com/img/file/pasanikadofojitexesaxo.pdfIn PDF document text
    • https://dacola.com/upload/files/32868905016.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/81240428597.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/zivelogakokobame.pdfIn PDF document text
    • http://amandamaitland.com/images/file/limobol.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c543f82127---66148721171.pdfIn PDF document text
    • https://vokalensemble-vocembalo.ch/userfiles/file/jolunafesu.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c01075cebee---jedopedufepafid.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b95761780a---85570851522.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/86hm3f1l56a2va4i8972jpc0lj/427222287.pdfIn PDF document text
    • https://ijpdua.com/contents//files/33663820198.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/675c7e0b4761ac6b36ca7b0178754785/70727135037.pdfIn PDF document text
    • http://agriturismofattorialucciano.com/ckfinder/userfiles/files/29822119147.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/36bb674fea0b708db33a6f260b4e0cce/nabibake.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/rululumijobo.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16124248f24d2b---gazagasulopijonedenemesem.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/79634299202.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/09853440fb8c66c20c818c325f22ba92/70075825932.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/14665767960cc44f9d4685.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/4e152aed925e8e983a838846a303a384/wavatunevosufazil.pdfIn PDF document text
    • https://kontiko.com/ktkweb3/images/upload/files/23645713481.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=biodegradabilidad+definicion+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4FA 10724 bytes
SHA-256: 8f1160a6d7ec584e5b32c1523fb6112201fef88384d6548ae5ff6bb461b8052a
font_01_sfnt_off0000cd33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD33 15632 bytes
SHA-256: f912e264a4b4e5c805c8828144c436e756b07fd415d68673a8cd92043607fb4d
font_02_sfnt_off0000f417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF417 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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