Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9c551abc87e75e…

MALICIOUS

PDF

86.8 KB Created: 2021-06-26 22:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: ca0bf07413e99ea2e1109d7258d7729b SHA-1: 7a6d1275d0690e2934fce3033ee6d7610f774fab SHA-256: ce9c551abc87e75e266ae3ab6941927a5b70987c69650a3dfca39e4806fd5dab
164 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 as malicious. It contains embedded JavaScript and a large number of external links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious or phishing content. The presence of JavaScript indicates a potential for further malicious actions, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://driftwoodcc.com/userfiles/files/30648733528.pdf In PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160cbbcf5555f9---74235678692.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/panoxokifaba.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/r3l2e53gv455ch478lajid4do2/34989547823.pdfIn PDF document text
    • https://xn--mietkndigungsrecht-best-gpc.de/userfiles/file/14176688875.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/63496101a57e122ed8a51cde7784d18b/50978443542.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/67d34247d6cb3b19638cdbb0d08c0763/43465692346.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607089176249e---83201085260.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ac10e6187---xujexerux.pdfIn PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/5687924612.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/ec3a179c1e6ae6135af7ab235c949816/rigewukesaxap.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/bizuragudeni.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/e2a0ae3f1b4cf23a14a7be71ad2bd795/75834787337.pdfIn PDF document text
    • https://nepalaviationmuseum.com/userfiles/files/xunikuweloroxixezo.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/e0cf0a6b833f7ea45e1a9093439b634c/giniwalegukilosirejepanim.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/kuluginorum.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d844ad153b---95115542431.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850e4fc6bb8---dadaxa.pdfIn PDF document text
    • http://come2menorca.com/images/file/kimelijutubejajegadiroli.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0860978fcd---30774734915.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf1e2258a25---27117692676.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b92a7195fca---28091244864.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/zuxekezem.pdfIn PDF document text
    • https://thuaphatlaihanoi.net/uploads/files/fodinimilalofeluripo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=macbook+air+price+in+usa+black+fridayPDF 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_off0000ed55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED55 17704 bytes
SHA-256: 64a57ab387412c3966f424b2d0055a5d7f6e5b6b11e3b19ffd0f9f198473d2e5
font_01_sfnt_off00011c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001345d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1345D 10952 bytes
SHA-256: 967468eb58a54a87dcf36a1de6f5161acca9ec7bf6d205a8cd9bdb2b856f79cd

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