Malicious PDF — malware analysis report

Static analysis result for SHA-256 b394eece105670bc…

MALICIOUS

PDF

90.2 KB Created: 2021-09-09 23:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 054f59f9a05b537c03d35833c4f4c206 SHA-1: 6a051d1c0c1dcaa0e0218582eb878d96dcfd456f SHA-256: b394eece105670bcd19cd9dfa9ddf40239354d6c7a0996cb0679195ec41c00d6
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to disposable hosting or compromised CMS uploads, characteristic of a link farm used to distribute malicious content. The presence of external URIs and link farm heuristics strongly suggests an attempt to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://purofirstli.net/userfiles/file/71748624310.pdf In PDF document text
    • http://licausi.it/userfiles/files/3863327652.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/nnn0ql7d2akdbn9sq04apo3ndt/lolokenefipepuvolar.pdfIn PDF document text
    • https://aordonez.com/images/contenidos/files/56851696870.pdfIn PDF document text
    • https://grafconsulting.pl/Upload/file/rotitavarumavipexow.pdfIn PDF document text
    • https://fond.ru/userfiles/file/dijupikodozavisa.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/161349b8ed4339---90132376097.pdfIn PDF document text
    • http://nepalbestcargo.com/userfiles/file/87367777655.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210907020907.pdfIn PDF document text
    • http://geodez.com/pliki/file/niriwowajufigel.pdfIn PDF document text
    • http://easyhypermarket.com/userfiles/file/begofapogobojos.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/59420461326.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/bokonupitug.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210903_0F0D970F4C806BE6.pdfIn PDF document text
    • http://hasyo.net/files/file/21409884285.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/jexidolej.pdfIn PDF document text
    • https://servauto.fr/img/user/file/duzozosofefir.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210904140615.pdfIn PDF document text
    • http://maxbrio.kr/files/files/8601132141.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d27a4832b---jafulox.pdfIn PDF document text
    • http://kerekagy.hu/UserFiles/file/25778092531.pdfIn PDF document text
    • http://sieuthikhoacaocap.vn/upload/files/16222076621.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/wusekegigoliwatalul.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/69604832980.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/bumama.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=brothers+2009+full+movie+watch+online+freePDF 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_off0000fa3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3B 11316 bytes
SHA-256: 566e796f13519ad0e08ab0dd1e43d7390540c6dcb9201bd8afa100b9f309dc62
font_01_sfnt_off000114da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEC 17840 bytes
SHA-256: 5d422e3e1ffbfdd87db855005e82b17d5b5eff05e33e3bbb9cf22deed32a443c

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