Malicious PDF — malware analysis report

Static analysis result for SHA-256 09fa491860d93afc…

MALICIOUS

PDF

141.6 KB Created: 2021-06-28 01:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c54198bea9aada030fde2c1f95f779b4 SHA-1: 7842266556aa344e25bc9c5a4bbda365df08ea24 SHA-256: 09fa491860d93afc41e0a3969b3c30d084dd9e3352e73e4f35fd535c8185d2ec
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. ClamAV detection and ML classification further support its malicious nature, likely as a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9851

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.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a15af3463b5---26487181596.pdf In PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160713b6016e6d---kagirojoratebukusi.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/79d14db5a7d8be1a4c2bdc58a5d9158d/34460686071.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/04hcji3ieiaa5ls5glqeu9t9fq/topaxopokasawafomose.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160a3855694dcb---wexomoliliwomogojagasuk.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/5qdvp3nfl32v0cactu94oc3o09/texakuforuj.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/rokivovuletas.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16081869332fc4---nejerutujijesik.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712fee4f5ce---77338379698.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/dolulilajujo.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607d61bbb477e---60518528152.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/13555952050.pdfIn PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/dolarinikumelobajuruxapo.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c87d45298ca---tafaxesinevoxexilag.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c685fecca74---59747820242.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/xijitukajiriv.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2808cf82a---74479278146.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/35787290364.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/fenigubinilamededigo.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/nilomaninafiga.pdfIn PDF document text
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/a6b9cd74c86c9fd3590630b0bacfccc1/98583133062.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=the+witch+of+blackbird+pondPDF 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_off0001b488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B488 17676 bytes
SHA-256: e208d489670872f6e374e9e3cab0192fc2e800be15abf465452c9c50e43ab9ff
font_01_sfnt_off0001e2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E2DC 10828 bytes
SHA-256: 765b0734ad606f8d640db5349ca9c150d7c091493694dd25f38c51f0f9266040
font_02_sfnt_off0001fb9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FB9E 16060 bytes
SHA-256: 8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825
font_03_sfnt_off000210b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x210B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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