Malicious PDF — malware analysis report

Static analysis result for SHA-256 9068a202c93461af…

MALICIOUS

PDF

70.6 KB Created: 2021-09-03 23:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f7cb2543fbe8255f57ad9a7ff197e5be SHA-1: c761a570f69f28d171d266cd757d836c6c9cc62c SHA-256: 9068a202c93461af8b0345939b7f60b0d4864f2c769d6bfdfe061ff1a1940bd4
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites that appear to be compromised CMS uploads, suggesting a phishing or malicious redirection scheme. The ClamAV detection and ML classifier further support its malicious nature. The file's structure and link farm behavior are indicative of a phishing lure designed to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://airflow-skateboards.com/upload/file/52630820379.pdf In PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a0f382912---wurinovob.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160acd3616f205---vemigolonivubisi.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/52e0eb848eff245a0cb2d6f113374f93/70647118627.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b842a103f8c---11243487969.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/85163584871.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/74027649943.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/lumasegewakamafoporaneg.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/rinaroworuladovewum.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc372c7900---56770555238.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/57204450832.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a0b2eb1c5---28798098428.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/21222810495.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/65486209715.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c995f1a08e0---funexekisuvelazimatiwalaj.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/35363892972.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/vavumegafebozizu.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/tegisolasagenebuf.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/qdkvrhttp89dbe2u9m0rjuk73d/kakuj.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/2497895319.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/ecf5de7875e1414853e5e384c6ba9395/78473730230.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/785acc7e7ba6a390f234f24b916f9f88/49221593786.pdfIn PDF document text
    • http://phongthuyphatloc.com/luutru/files/69649046899.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/ferogi.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609923a49e208---9168836006.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lemewawe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=ics410+ics%2Fscada+security+essentials+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB56D 10944 bytes
SHA-256: dd8d46c7b7177a966e27c1f6bd4a19caf322b5a242044c0a469ab682b5cf7d96
font_01_sfnt_off0000cf15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE727 15016 bytes
SHA-256: b04ae97ee87252067b000abb79eb08177fc525cc57775afa06d3640e12271831

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