Malicious PDF — malware analysis report

Static analysis result for SHA-256 54acdfc40360914b…

MALICIOUS

PDF

84.4 KB Created: 2021-07-03 10:09:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1b7972196f8cc9f51ef7771e00c7ca66 SHA-1: 98b395cc9b45135b8b0f2c61d05817ccd4daf1fc SHA-256: 54acdfc40360914b5872c89b47b7b46cbd88adecef915bad086b79159e0c5a12
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting domains. These links are likely used to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://alteanetworks.fr/img/file/20605522165.pdf In PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/48db2b032a0d0d9cab16e28bef20e2fe/35068059088.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/xatawas.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16082856b8eb19---finuwotinapiko.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d10f2ad592---fabat.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/sepegivuvubepoxofoxo.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/5cc24a816f0848cc22c6d32d67c89cf3/32442718387.pdfIn PDF document text
    • http://adveotec.com/img/file/rujidofabamerowijobuzif.pdfIn PDF document text
    • http://fairway.cc/images/blog//file/pewobatu.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/ef004407e56fe5d419d717d802ad6754/73815249309.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/5vj1d2f3jbn8vnh522vcqa5np1/52785874142.pdfIn PDF document text
    • https://slaterlighting.com/wp-content/plugins/super-forms/uploads/php/files/5f64643a6e27adcabaef802217384b71/92587784332.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac432a9e2ba---votibuxipuwezob.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/wasuwokuwiponag.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/vatirorejelitazolumili.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f99e5e29d7---befaxozoxiluzekux.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831b241c711---6042644844.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7279bcb1a1---72620902433.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/pukajujatemubivaja.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/eaabb275fc2bcb504f1afcaf3da4787f/72952474423.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210617063532.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/33872043322.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/66644948027.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=heat+of+combustion+of+acetylenePDF link annotation
    • http://janyska.home.pl/_mjanyska2013/fotki/file/pidoravoneze.pdfIn PDF document text
    • 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_off0000e5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B3 17436 bytes
SHA-256: a7ece6f29565e22a4775631da662cc3e04f2d5a6245ef3c31d0809e214361ee3
font_01_sfnt_off000113cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CD 10740 bytes
SHA-256: b0eade86879e912dcbc11098a262d71e25e7d8c408893bc687785da17254a153
font_02_sfnt_off00012c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1