Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfb60b54aff81e67…

MALICIOUS

PDF

83.1 KB Created: 2021-09-15 14:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: abd162e05b708a79a48db93d6cb9e3a9 SHA-1: d5f9aea8013111eaf20a0626ebe25acd35ac8b31 SHA-256: cfb60b54aff81e67f505d5e4b21d943451296e4e07644046712aff22ce39e9ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous external URLs, many hosted on compromised or disposable domains, suggesting an attempt to direct users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://ageddfjtjgrade.pretty-match.com/upload/files/66074706179.pdf In PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16136e7cb2283e---vosurukog.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/44949907895.pdfIn PDF document text
    • http://avrig35.ro/uploads/fck_editor/file/79582824587.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/84820190793.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/57230123560.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/90265612417.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/6b3a7cf0ff56ac922f2f3b093e4e3d61/9798061747.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/23c6f4798e7550ee83d13cf4768ffc63/xamusegosaxojulegobemiw.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/zidixataxisete.pdfIn PDF document text
    • https://crc.creativechange.net/ckfinder/userfiles/files/jimeromokogumizusiliwidep.pdfIn PDF document text
    • http://webmba.fr/client/logo/file/vinasunozijuzakuk.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/sizefojinomalov.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/worofitojizexub.pdfIn PDF document text
    • http://gymostrov.eu/gymostrov/userfiles/file/rifizif.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/161416594ef40c---fufegi.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/wonipadorel.pdfIn PDF document text
    • http://wamaeassociates.com/images/uploads/originals/file/37386112604.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/sowageremibol.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141635a06180---jogezobod.pdfIn PDF document text
    • https://viktorina.ledoritulys.lt/files/zopaxalikujuruviloxeru.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/kojasupezanatalo.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613370992f116---71744520869.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613056746fedd---pevujupusisirigij.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/e4e45feadde0ff2925c393f008d9b2d1/nipakupipowikenijo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=pubg+lite+korean+version+apkPDF 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_off0000dd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF522 10828 bytes
SHA-256: 6be3bd66bd1a0086ce009dc80d8d439898729624d87eb6ea0f50625ee74bdb4c
font_02_sfnt_off00010e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E09 18564 bytes
SHA-256: 32bc7c9634f4400f85b057a18e114747e20d645a7e1faa683200486f1a9e85d9

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