Malicious PDF — malware analysis report

Static analysis result for SHA-256 c53e3c19f62327b6…

MALICIOUS

PDF

77.6 KB Created: 2021-08-13 16:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4905cd741780916ced3950216af339c7 SHA-1: 88f16de2e83556713adbd0022258c7d758b722d8 SHA-256: c53e3c19f62327b60bc79437a54904ddba9993c08c369e673a8b6d114ad96d4e
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised CMS upload directories, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these compromised sites.

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 https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/651c99af861b2fb443b1b0e1cd560dab/rakozawodanakuto.pdf In PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092437e061de---napewabekis.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/12153848307.pdfIn PDF document text
    • http://teplospectr.ru/images/files/29563197128.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/42187463655.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/nitoz.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/4541264401.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/xegotuzub.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/9f0bb952d13e3903aa5df43dde2d8265/jakadazusuxefedus.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/16956563737.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7c10b951d---77309966703.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c88674ac9db---27294323207.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160736092adc56---93423235971.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/7fskkkq456drkkgflk4q0trl4j/9768652543.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3a8dd781c---72249966161.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b766868df57---88694755241.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608388cc44b51---30353030412.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/66568662396.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/81035015544.pdfIn PDF document text
    • https://vhssirimpanam.org/ckfinder/userfiles/files/wujibisujaku.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/3ae1cc11c7c6b569baab710371bd026e/55125143292.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/d74999oueo6ucisg5njc1tnqr6/nemevi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=ananya+bhat+sojugada+song+free+downloadPDF 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_off0000c96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE181 11092 bytes
SHA-256: b59791f767c8f45855063169928e9f38e042b4bda2d5963fbdc370233ce6696f
font_02_sfnt_off0000fb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4A 17368 bytes
SHA-256: d8853bcc82639523d971b64eeccb47b1418b7d8735ca2d05f3a3e9610e439546

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