Malicious PDF — malware analysis report

Static analysis result for SHA-256 65748f7a70a4659f…

MALICIOUS

PDF

82.8 KB Created: 2021-09-15 09:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1b2719b0ecd920b6fa8b6250520e0f25 SHA-1: 2e496649fc267c3ba64a7f760eb55a1d7df2246d SHA-256: 65748f7a70a4659fe50d9c355e69b86996cfa564ad497b49a3081969056ebdba
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. The embedded JavaScript likely facilitates the redirection to these malicious URLs, which are designed to lure users into malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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
  • 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://irlanc.ru/uplcv?utm_term=redmi+9+review+india PDF link annotation
    • http://szsahsh.com/uploads/files/kibike.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402ee1b6908---zebekorifenexojesipedek.pdfIn PDF document text
    • https://drlanda.hu/user/file/goduxetop.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161417fc7e86a5---nonanikobozaxurelevemul.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/s0m638jiabrbgk8td35cskuped/joganigodivukoraxen.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/8022714384.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/0b0e35bc437be645fcf7ad01dc999a7e/pudazudinapixetowineme.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7c0063549---gexusaxajuwawuxukotemu.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/92672196524.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021091216490273499.pdfIn PDF document text
    • http://dbexpertise.fr/catalogue_dynamique/file/58332480121.pdfIn PDF document text
    • http://perechen-jurnalov.ru/js/ckfinder/userfiles/files/gozowuraxabewunozafamiwu.pdfIn PDF document text
    • http://proficlim.ru/public/userfiles/file/fitobemipuvutopuduzup.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe8b35cfa2---funexugubekigemafogikaxaz.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/93075046958.pdfIn PDF document text
    • http://abworder.com/uploads/files/84996237246.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/47696003719.pdfIn PDF document text
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/34013424326.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/hjjq7enkmibto278jokhs6hq56/75696450080.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/xoxodadinaxukifijisisib.pdfIn PDF document text
    • http://filipdegreef.be/uploads/files/10989298036.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ccd1c14a8---sivunataruwin.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/lukovonabazitegulamusipag.pdfIn PDF document text
    • http://gvs-russia.ru/admin/ckfinder/userfiles/files/71411175087.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23E 10340 bytes
SHA-256: 6cfb8d2af0f1f94cbc0b05ccccbb81cbe7bb2bcf2492ad150a3e4ba35078fac1
font_01_sfnt_off0000f997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF997 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A9 17084 bytes
SHA-256: ced92bbd999ee0f96d0712c7a30179cab5a33a8e6579510c12bcfd870d65a8bd

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