Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f66599bf4331ca…

MALICIOUS

PDF

95.6 KB Created: 2021-09-07 04:36:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e8dec7cc6be268d1034a1d1b4e500632 SHA-1: e9f02c2ebe84a31740877dabfe679af7c25be1b2 SHA-256: 14f66599bf4331ca74f186791fd366b552a664c6cadbe8ea1ebc66ba72dec301
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to potentially compromised websites and disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and embedded URLs point towards a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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
  • 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://valve-toho.com/userfiles/file/41323901992.pdf In PDF document text
    • https://gsm.company/ckfinder/userfiles/files/wikasogizogopugewut.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b55d99970df---bepoxalipolexazik.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/17a51e0aa00b3e68969fd18fb373844d/kosafini.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/34574537862.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16101053eb251c---5580502291.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/93716289451.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/f7010a43ae351a09d93065b1665dd721/79418601678.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/8312940383.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/95280709395.pdfIn PDF document text
    • https://cfaegaianascente.pt/portal/userfiles/files/wolaxuxutosidesidizefixi.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/49a45a9d5958c21b2b457305675b11e7/70638181718.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/12169665073.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1610be85125c82---83046342766.pdfIn PDF document text
    • http://zagazzo.com/userfiles/file/sarodete.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20215291728183789.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/ce59d351952d2542998a0799f9737b82/41913284191.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/11174065907.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/mabadafovelopexafinet.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f2fe73c1468---1337136233.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-6-9/20210609002026916386.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/55638387632.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/279bc04b2244d4a1f95bcbba4f059325/gevuxufiduwapakakonepumi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=fundamentals+of+business+book+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_off000110dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DC 18068 bytes
SHA-256: 3e6bd55a6cf7abd003ee18886c08d6dd8c0483e6884d02c7a9229c31db560a78
font_01_sfnt_off00013fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC6 10868 bytes
SHA-256: 309661dbb0973830021c0016feb63731228f9963219a875cfa0a61ad9a53e195
font_02_sfnt_off000158a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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