Malicious PDF — malware analysis report

Static analysis result for SHA-256 e72979c64a54a57e…

MALICIOUS

PDF

73.4 KB Created: 2021-09-04 08:04:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e1c712f434846dfb02fd92c43c16a296 SHA-1: 4a6b7f292fdf48b326b95762b3b9f050be3c9b05 SHA-256: e72979c64a54a57e1ee581eb8cdda6defe3f40f96bb4087bf51594cf62198957
96 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to potentially compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the structure and embedded URLs suggest an attempt to exploit users through deceptive content, likely leading to phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 5

  • 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://protectname.xyz/whoisprivacy/userfiles/files/57826496044.pdf In PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/r8vh1vji6eic5cad85ct8gesi4/jetezewujesusiw.pdfIn PDF document text
    • https://channeloflove.com/ckfinder/userfiles/files/zezumokikezavot.pdfIn PDF document text
    • http://greenbiotech.vn/uploads/userfiles/file/18105044229.pdfIn PDF document text
    • http://candientuvibra.com/images/file/33125553054.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2cf8d4f714---famunotolubi.pdfIn PDF document text
    • http://vincentpopetutoring.com/clients/d/dd/dd6b7bcf94cac99d3bed97cf8166637b/File/53667683996.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c490a5ae055---36793928138.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/29098461664.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/mevinisip.pdfIn PDF document text
    • http://www.scea.edu.mn/ckfinder/userfiles/files/11502280408.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086816801034---lawubofugam.pdfIn PDF document text
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/46766833747.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed35e266f9---33136641179.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/7c6a96690d2a7f1ec2d09f832ed7eded/11765278323.pdfIn PDF document text
    • http://trivio.it/userfiles/files/setukupavipejejo.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/43377868696.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/3rvjnqovnfo0tmljmikf280184/josusodinibepijosexafofab.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/nabetesozenaravijime.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2866547796.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/2470082894.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/29085287798.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/71382479880.pdfIn PDF document text
    • http://goldenagegroup.vip/userfiles/file/47618700816.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/48018987171.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/75462062407.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=metro+north+new+haven+timetable+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_off0000bb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB04 17104 bytes
SHA-256: aa3a11f9f7963aaa48cbf2e8a1e0b14778de5593338092b261c2d2844e4e949a
font_01_sfnt_off0000e740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE740 10880 bytes
SHA-256: 32d0b04828055c5a6d8f3ca43f9400fb1f0dfd15cf4622e01ebf9445359f5e64
font_02_sfnt_off0000fff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1