Malicious PDF — malware analysis report

Static analysis result for SHA-256 4de38a7a796417a2…

MALICIOUS

PDF

85.6 KB Created: 2021-09-01 16:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 37e3200fd06157a532ab9a4e3e9ba45e SHA-1: e8ae1b8bc81fd413457be6a070fb54503559ec18 SHA-256: 4de38a7a796417a2c3d45d3105fc170a57251d26f495f0b1e1a89cb540a11f39
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure suggests it functions as a link farm, likely to facilitate phishing attacks or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://ecohouse-lab.com/userfiles/file/73223094324.pdf In PDF document text
    • https://tch.lu/files/files/2319745548.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/jrc4dvotpqtief5vblkfqjed8i/lunikididetobevow.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076f74d2ff44---91233916275.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/d8b8e906cd1b3224f37eb7db7029fae8/18359803255.pdfIn PDF document text
    • http://www.ocptecnology.com/admin/uploaded/fck/file/rozelefaxojepilij.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/8ce837m34surgou1vrlu4k5uq3/podasogagugagofogovugumi.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/bk23r3p54aohebdf5bke8pq7mt/22218688411.pdfIn PDF document text
    • http://originalbau.hu/imagesfiles/23103050095.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/kiledetavozomuxal.pdfIn PDF document text
    • http://janatalnajaf.com/basefile/janatalnajafcom/files/fodebukusimadutumaponewi.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa6fcd7b87---nasirutavat.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/46526170879.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e769101688---42186026467.pdfIn PDF document text
    • https://shih-tzu.ro/files/file/xunako.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/t4n505ecphmfl7a5a5eg7rbqb9/29786935388.pdfIn PDF document text
    • https://vydavatelstvoklett.sk/userfiles/file/mojenamugasokipokibadefuz.pdfIn PDF document text
    • https://www.utn.ac.cr/sites/default/files/files/poluputaf.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/takumum.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/76371874152.pdfIn PDF document text
    • https://www.luxboss.com/ckfinder/userfiles/files/gaxar.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb75d147f6---90999886205.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=peter+rabbit+the+tale+of+the+unexpected+discoveryPDF 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_off0000e6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FA 11240 bytes
SHA-256: 4d845ef0adc406b3efc366fd3acbb74beca2e781893192e0f2d7708f4989a1e3
font_01_sfnt_off0001011e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11930 18044 bytes
SHA-256: 6e94d144100167844cd58d1f610759c2c5ef53a5552ec95a2f3036fb507b7cee

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