Malicious PDF — malware analysis report

Static analysis result for SHA-256 e90fba61e04afa59…

MALICIOUS

PDF

62.5 KB Created: 2021-09-21 15:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3a8f627fae78fc2ec6913f5fad2e7647 SHA-1: 3f51b8c319dfc772421bec9ea3e49105f4eabd90 SHA-256: e90fba61e04afa599911d2b1202df3ec75dc2ad341be9082745a79cd7933dcb7
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing embedded JavaScript and a large number of external links. Several heuristics indicate that these links are part of a link farm, with some hosted on compromised WordPress sites and disposable domains, suggesting a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection or download of malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2574

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.
  • 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
  • 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://nedimgame.com/calisma2/files/uploads/sozokerasa.pdf In PDF document text
    • http://www.allatpatikapecs.hu/images/file/12896277979.pdfIn PDF document text
    • http://tlw.ro/UserFiles/file/sikosegawo.pdfIn PDF document text
    • http://wuyioutdoor.com/userfiles/file/49085208218.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/161317c4b20095---95128570642.pdfIn PDF document text
    • http://cetis156.neutronds.com/assets/js/ckfinder/userfiles/files/68536119705.pdfIn PDF document text
    • http://abwingscolley.com/uploads/files/68573063406.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/jutegorigijalibijugofivun.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/nizizavubaxolumata.pdfIn PDF document text
    • http://irs-messtechnik.at/upload/mebeforifugis.pdfIn PDF document text
    • http://sbsinternationalschool.org/userfiles/file/fabelegeruzikogur.pdfIn PDF document text
    • https://hongming-eco.com/userfiles/file/90568174143.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/ee257400c2d2e8099b2184e1f5d8c468/89870373011.pdfIn PDF document text
    • https://stonebuild.bg/f/uploads/files/lotinapazobomimigip.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/41242493935.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16132615e87730---bimemago.pdfIn PDF document text
    • http://omni-links.com/images/blog/file/nutapifewagizaruvupe.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/29870382875.pdfIn PDF document text
    • http://unitec-egypt.net/userfiles/file/36461099248.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/zokex.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613695324a8ae---rozef.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/75617102131.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/zebirudanegegamubizibul.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/45204442643.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/jawixefobamibugo.pdfIn PDF document text
    • http://majedalkarkhi.com/pics/file/26258666842.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=real+fm+radio+apkPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC431 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC48 10428 bytes
SHA-256: 4308a0c84522e72e121032ce1d9e08bedf5597eeaae5f4b27345970f4f851b2e

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