Malicious PDF — malware analysis report

Static analysis result for SHA-256 b869de278c172d2a…

MALICIOUS

PDF

82.5 KB Created: 2021-09-03 00:11:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c46372d5ef314b3bcfc70f8898464f25 SHA-1: 14edeaa1667f9e37845ac4762edf878338a1cc33 SHA-256: b869de278c172d2a4b9cf3f5e231263797e96a0e8be6b9ac6d941a9e27afd719
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://unitytradecapital.com/ckfinder/userfiles/files/pejufijivemana.pdf In PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/430bfa63b883454183f5a0ae4eff3947/38578086351.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/jemifedikefisaner.pdfIn PDF document text
    • http://tecnoservizi.com/userfiles/files/7921243763.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160fb5669edee3---luwafawuwuz.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/5bd85eda6bed6685aa276089d03fcdc1/1054899388.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/75392569527.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/92788699132.pdfIn PDF document text
    • https://saintarseny.ca/sites/saintarseny.ca/files/file/wujuzobivusekuzoxonunume.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/f895823fd0446997271d3928be2abe2e/tufinisedimezutifubinas.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/84581857878.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/521a76def155d729dbfa89aeec4f46c7/70782346745.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/ragaxidiwunozarum.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/talogopevonunebupuvef.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/ebe03e18e6aceb342fcc99e0bb2756c9/sozepije.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/dafaragudokewok.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/noxodita.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/mofiwenesariwinumafofis.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/99371100236.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/gj65egubbm8ufmeh6k4qk83ch3/ponigajaxuvujavidizuw.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/baxaguloj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=applications+of+cathode+ray+oscilloscope+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_off0000df5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF772 10812 bytes
SHA-256: c1c1587a66efe601323ed0858c92bb64a59254b4e9cf9aa9d473bcc2593028a6
font_02_sfnt_off00011067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11067 16992 bytes
SHA-256: 9739f2a7afbd66f2922ebd4dc5642d09ddc372db44a3b78f7bf3fb3661c70230

Open this report in the interactive analyzer, or submit your own file for analysis.