Malicious PDF — malware analysis report

Static analysis result for SHA-256 de14c44461784a5b…

MALICIOUS

PDF

95.1 KB Created: 2021-06-11 02:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: af5f5afc88addb54936cd0b2b69f8a8a SHA-1: 5a8621f2ad75ae9c99b65644e72152c25ef095e0 SHA-256: de14c44461784a5bdc01d16fdc0730003a134e0da21c1a3972a53cfbd0d68e3f
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it is likely a phishing or trojan delivery mechanism. The document contains numerous links to compromised websites, some of which host other PDF files, suggesting a link farm or download lure. The presence of a 'download button' heuristic further supports the intent to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://huntic.ru/uplcv?utm_term=i+am+faded+mp3+download PDF link annotation
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/e0452a15ade9addf7360ba92a155abd4/21458723797.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud//files/lurifuxafuxew.pdfIn PDF document text
    • http://hocikto.info/userfiles/file/74605052516.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc0ef9d4cf---lalasajajosafojo.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/5354055d0b4bea386f42a821ea35eb3e/46810864005.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b290820f50a---89325586946.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/2ebjh3uclb29k7d8bh5lmden7g/53678074045.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbc34d6339---60579521223.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/b5ea3cff4ccef9052a221ea9c7a5e591/86254796096.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/85855240048.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/88f7eb4bnun5k4i84r7dt6i5i5/49025441429.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/85kka1edh3u26scs4lmftfahri/95865929139.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/53791020981.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/f3fddba63d5e2207ffcc28c1e6da1d43/mufuzumuvogisememubazerim.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aba211f367a---maraposunep.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16094413d25e3b---35319563819.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn 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_off0000e041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE041 6924 bytes
SHA-256: 769757078699babf77203a3c7ffae8ff8f0879df2c595c3616363ecf706d0234
font_01_sfnt_off0000f1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C7 5108 bytes
SHA-256: d87d8990aab0e84d225ae16a7345899d0fe0921939d4f45cce274b42908d3efc
font_02_sfnt_off0001032c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032C 12940 bytes
SHA-256: 5c0cdefc39942d8f09389c1aa3871f8bff3995db00ee75e727a8dc186942783e
font_03_sfnt_off00012c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C87 12264 bytes
SHA-256: e67e96f0f74b0188f0f295501ad254ef6a6540f73bd86d7351eb8e9d24118bda
font_04_sfnt_off00015645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15645 16824 bytes
SHA-256: ca512da7583b3baaef4c8a4df6d92b566e7a26dd44f12713e9a07625dbe2896a

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