Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6ea8e27ccf4e81…

MALICIOUS

PDF

80.9 KB Created: 2021-09-05 04:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 8db3b9bd0cf611dfb3908a662d0e6959 SHA-1: 74ced90209a249d5e87e9017d54836c79b2c8246 SHA-256: 9a6ea8e27ccf4e81b0771bba4c5d6154ab50eebff157672cb2a7de5ddfe232fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://garglob.ru/uplcv?utm_term=honda+beat+scooter+service+manual+pdf PDF link annotation
    • http://inspiredindianfoundation.org/uploads/venidadewujosuvatu.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d01705770a9---59417989447.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c930b8ed7f6---mozopuwamiwofa.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/84402371104.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/14071705302.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/85533591344.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/qln83422qpa3fdu797kt73utb8/tefogifezazixovesa.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16087c491d0316---25127459714.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/ce7a655c0ca6629a87f0065a8204ac88/26681547810.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/namebupijulakagolanapo.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/6196545620.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/bekorim.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/l8gj7e3mq017e10vi6clib5le5/bezonelubusofo.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/rorejagokewejegegawolexi.pdfIn PDF document text
    • http://terezszilvia.com/images/uploaded/file/lajirewasupalidevojiroku.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/99537068652.pdfIn PDF document text
    • https://performanshost.com/calisma2/files/uploads/konolunusegaxoka.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4c51bb6d6---zaruxesugeleras.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/1ee0fcc77e0fbbbe59b9eac2261d56f2/wagoxugezilakidibafosuja.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d950c9f9c---medos.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/files/xuleb.pdfIn PDF document text
    • http://www.miwon.vn/app/webroot/uploads/files/gemilu.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/70b1b6a45d675c95787683200eb3db63/zikadovodunigakogifa.pdfIn PDF document text
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/b4ef2b68e6f8991a8676aefb445589e5/4141806602.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a5261571143---97922471304.pdfIn 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
    • 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_off0000d84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84D 16868 bytes
SHA-256: 59c64676209836eaa4bc1c7edb2f2555c45b7a68f6a97b0c37ecfc49e7a4290e
font_01_sfnt_off00010441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10441 11080 bytes
SHA-256: 677c867157ba3184edab31ba7728b12f2263732be1da8e654229f142cd5e62f9
font_02_sfnt_off00011ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1