Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2a8dc647f1c08e…

MALICIOUS

PDF

84.6 KB Created: 2021-06-28 04:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e144ef9d8050314568a30a1c3e67995b SHA-1: f11c00e083d647bdfd9e2bdc15f908aff811dfa1 SHA-256: 9a2a8dc647f1c08e99bf3548d20116d332813214c1888fc3fd78330608e816c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. It contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://coretry.ru/uplcv?utm_term=who+is+my+godly+parent+in+percy+jackson
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/48767106995.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160986b9ca063a---88570562352.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/4pdm0miei5q6l8qpnc7lvue76r/65644149263.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/6013c7cfe99bb5f0188a6c3a05aefa87/63268385116.pdf
    • https://bacninhonline.com/webroot/img/files/wizikevimobebusivakiseven.pdf
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/9528881161446b882684278b54d6edcd/dudibedokaxago.pdf
    • http://jorkurojus.com/userfiles/file/jefisobemujusolak.pdf
    • http://best-infosystems.com/userfiles/file/66190632291.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/69461790f6f26c57f43e2815ffaaee0f/28936427830.pdf
    • http://xn--o79av69abka850ab6c.com/upload/file/202106111034008378.pdf
    • http://zae.me/datafiles/file/66900573248.pdf
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/25224424772.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d62679e213---votizilimakimikapixov.pdf
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/asgjsmfceorh7lpah0ldtu7eg1/83819339912.pdf
    • https://pypconsultores.mx/userfiles/file/xewipi.pdf
    • https://wecareprogram.org/images/file/85852957024.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7519d6c28---55529958954.pdf
    • http://xboxheerlen.nl/userfiles/file/zasufukipibekoduk.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d29e18af20---8183953891.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a43a9ca61c---kowatefuvideki.pdf
    • http://gloucesterclassof81.com/clients/23558/File/sizifupokis.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/a013e760947410f8c05a705244533e04/xedawekov.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/51rch5m0r5kr8n87892tri4ma3/78356385648.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b8aa54bf1---simigipo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc30.bin
b49c70526ec75b2882b41349505d2c20450ecb254786dffb02651934aefd0aa9
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC30 20060 bytes
font_01_sfnt_off000110c7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x110C7 16792 bytes
font_02_sfnt_off000128de.bin
66cbfa66c34002210fd0874d859d8bd92a2b029b646d3c4e23f115cd1691573a
pdf-font-stream PDF embedded font (sfnt) at offset 0x128DE 11288 bytes