Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d30de6f67a9a772…

MALICIOUS

PDF

81.5 KB Created: 2021-07-01 19:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1d24172e7d856fb03ed8ecb19e19e424 SHA-1: 5f5883c2f34526df247a1ebc7de37fce3cfe6f26 SHA-256: 0d30de6f67a9a772e3e09b6f1fb4a4598c3ff8847a24038470c6d5d75b616e18
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a fake CAPTCHA or human verification prompt, likely intended to trick the user into clicking malicious links. The document also functions as a link farm, pointing to numerous URLs hosted on compromised CMS upload storage and disposable hosting, increasing the likelihood of a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 http://capableapp.com/uploads/files/siloniwanufaxeje.pdf In PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ece405423---2372573074.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/d5c80dca3b952ed8e9efb8f3d3f48b9f/9141816571.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b93a8de37---nozekesamuxogewedenutoz.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/fujizafujilere.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/fp23evfdjj5u2ubvs1qhboccr1/8641219070.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/tudapomuv.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afa0db5d41d---57563508343.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a867de8ed36---27139650192.pdfIn PDF document text
    • https://appchecar.com/ckfinder/userfiles/files/91549118098.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210620145020.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/febosenuxipikoredi.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/wifitejokeluveta.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/1844c83ff4035435deb98853e0783ce7/5398473891.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/cf6d7b054be07ec67ab877c5ccb0b689/53899771222.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/paruwavigerilo.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a88ae382668---wojufifudav.pdfIn PDF document text
    • http://bio86.fr/fichiers/zovomijevitizixofad.pdfIn PDF document text
    • https://multimetrics.com/ckfinder/userfiles/files/12518313672.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78b909bf1a---pujigebobonerivivuvi.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/33bb7acb81c58e4db82253d3464ed125/juzolokab.pdfIn PDF document text
    • http://nessium.net/userfiles/file/luvuginuzewufe.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/469e6b75175ca5f75a09f1f91051182b/63181817790.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f477eda05b---4544864400.pdfIn PDF document text
    • http://jump360.co/upload/files/20210616094242.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a762d6d2530---wewarefujejozeladete.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=elodie+alice+onlyfansPDF 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_off0000c788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC788 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
font_01_sfnt_off0000dd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f51e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51E 10368 bytes
SHA-256: 9b8d41c7b938192af4ac450b63414a4070b19ace8c2ec0a705a48f61f8e6ed1c
font_03_sfnt_off00010c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9B 16660 bytes
SHA-256: 4165fd878e5e3acddfc2e33c90bdb1fbcfbfad53b4612a34789e0406cd5942ed