Malicious PDF — malware analysis report

Static analysis result for SHA-256 5db74f38085533c9…

MALICIOUS

PDF

91.6 KB Created: 2021-07-06 06:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 245551ba0e306b84b6b7f5fcdb853b99 SHA-1: 19882901c481ca81c8cef7ab6265391c330e4c25 SHA-256: 5db74f38085533c94257011f5ebd211acf19fb4ff9cc7f6b1bcb3a5b7e6f5734
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs, many hosted on compromised CMS platforms, suggesting an attempt to direct users to malicious content. The file's structure and numerous external links indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/93658cb25f22b4723a2309dbc934de8b/bivolejili.pdf In PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160923fa83e388---penewaminobevinap.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/23781531264.pdfIn PDF document text
    • http://yetisirkaucuk.com/firma/files/39044510731.pdfIn PDF document text
    • http://dabbleanddesign.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/pesivuna.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/ziwafudavosozijipunib.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1eb95aa5b---83157994186.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/vixaminakufomujovos.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aa62d596ab4---jebobavusijilivilirijil.pdfIn PDF document text
    • http://stlukesmn.org/clients/17773/File/57914474136.pdfIn PDF document text
    • https://ubranni.com/uploader/files/mamamuvipuviwadir.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0c5785080---34201476935.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/9f36efa7be9779fa57a3877cbb50c7b5/sekozigirejana.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160781ddd1b807---48443569562.pdfIn PDF document text
    • http://holzbau-napetschnig.at/41576535603.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/5eca8aa56dd5195bdcabc6eea1fb5c21/464527941.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c95d753a24---jijuxana.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2b693fad9---5625485429.pdfIn PDF document text
    • http://jarosi.hu/files/file/89577102658.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/rimezavarowosafimuz.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/pugalomewosorono.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6b31e6f8a---73303431390.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/5391026773.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/bebusasetejefudatuna.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=importance+of+network+security+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_off0001001f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001F 17808 bytes
SHA-256: 7e4643e2047ce60d2a81085ffd647bd76d74fadb683fb5e36c668a141d3aa304
font_01_sfnt_off00012f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F11 11080 bytes
SHA-256: 405d55781d0b3a10f52ce5609e0510b9d0943ca82b214735b3f0963c445434dc
font_02_sfnt_off000148f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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