Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee8e5c91f724edc…

MALICIOUS

PDF

90.4 KB Created: 2021-09-05 02:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8d531524eb29f17e08b2902ca23c349c SHA-1: ff5be5614b1cd3476dfa0eef657e5d335887f5da SHA-256: 9ee8e5c91f724edc95ed2c2cc70d96abba0740eefb13420dcc274be7cd5501a7
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised websites, indicating a likely phishing or malware distribution scheme. The presence of external URIs and link farms on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7768

Heuristics 5

  • 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
  • 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://medvor.ru/uplcv?utm_term=manusia+sebagai+khalifah+di+bumi+pdf PDF link annotation
    • https://homeuu.biz/upload/ckeditor/pages//files/xabaxerapizare.pdfIn PDF document text
    • http://tapestry.cz/images/file/files/29499624.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c12a1e48be---dibarapobubixebad.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caf0cdc94e---kipelo.pdfIn PDF document text
    • http://perksys.com/userfiles/file/99015578693.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/n91ktm113foardi9prg24h7pq4/36247909064.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cebcd9943f---zuzimenusivuresixugopis.pdfIn PDF document text
    • https://campermagazine.tv/public/file/xuwalirokoja.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/rejexukogixabutinapiw.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/52646809481.pdfIn PDF document text
    • http://cosonhuath.com/hinhanh_fckeditor/file/kurivuwimuwirovovok.pdfIn PDF document text
    • https://tanthueviet.vn/img_data/files/63393496559.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/82626250042.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/34947008741.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8ee853042---fawopibe.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/0feb363204527a1426471316b396cc08/wefozixero.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/68b629a2108993f2800e17e3a4c26aab/75922219588.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607992d7ea835---vinax.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ac8194f16---60635015002.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/9a59755b7ff23ae8c5f77abdebbb57fb/tefuxijibizeminorajikolo.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075e2c0abd9c---metepevowugigademubekisi.pdfIn PDF document text
    • http://clarkstownhs64.com/clients/2/25/255c49a504cbad61718694d8b78dfcdd/File/regugemozojob.pdfIn PDF document text
    • http://rhondachem.com/d/files/38282095928.pdfIn PDF document text
    • http://konditsionery-odincovo.ru/upload_picture/file/74818948925.pdfIn 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
stream_004_off00010ffe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10FFE 27320 bytes
SHA-256: 90b12b2f309f4802058eb32186b00bbdd5320d2ebc75efd3e2bf8d11d4fedddc
font_00_sfnt_off0000df34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF34 10952 bytes
SHA-256: a94df3bc04f48c810e8290c866876e856b493dce2ae3e8b5cfe889d13ba8fb61
font_01_sfnt_off0000f7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14267 16252 bytes
SHA-256: 5067930e228fb3c27420111f0eaf2f47ed63c07a85cb8a609fb2f8f5afb37f53