Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a2846d058606a3f…

MALICIOUS

PDF

80.4 KB Created: 2021-09-05 17:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e17bbb17c65548c21183a2c4d67785c1 SHA-1: 6fd67ee1172aa617f59fbfaa1d7b888da6e5180c SHA-256: 8a2846d058606a3f7ff87e20540ae28e62694bae0abf71b3f2e4471e72f6ff9b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm heuristics strongly suggest it's used to facilitate phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5466

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/5da50a85a0b3af9b4303156dec11f875/15050446968.pdf In PDF document text
    • https://atcotourismtravel.com/userfiles/file/wajufala.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/11729723272.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/01e80c7d21beb50749a3c7a1bed5b2d8/48699286115.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/vegimebeketetiw.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/c9ce062b343c7c26a9be455e2a6d634e/robujigegosis.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c61f99ec697---mefuwuzaje.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/18635056277.pdfIn PDF document text
    • http://nbpcpentecostalchurch.com/clients/65183/File/34752644301.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/gobajedabuzonax.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160967c74ed2e4---41711256744.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/kubapusuvirunedadis.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70046b1adb---delupoxezatuwamudizilupu.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/fiwatazopizikefujajub.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/11233691551.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/505fje4hdtno56q823o46jlnv1/89593471772.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/23s9v0apgsl060ip7shad75to0/82126253749.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/a0dd32c244ea3eb929543af90a176153/71681402260.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f01af10ec4---46172235963.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/hgjdujmarnlae30ddifhsu6nrh/nawematuxenelepaw.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/soruki.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/39056202627.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090766208bd8---59422039049.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/92365891640.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/f08f3df2da3ad96c50b6f731d9e9db33/sokole.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c93efc033c---xetevagixedukinemidu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=business+idioms+worksheet+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E6 17972 bytes
SHA-256: 78e6e6f811c282475f99d45fe3f06ee3b5ce68d5a33241b797643d8e2c77bcea
font_01_sfnt_off00011f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1