Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eeb45e334dde907…

MALICIOUS

PDF

90.4 KB Created: 2021-09-05 20:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 17099045420262e53ace1e17efb57319 SHA-1: 3e43fb774fe2932edfb45d9cda17945097acefe1 SHA-256: 6eeb45e334dde90735e7756e134bf44c5217587bcf17a99ef519d27fe85de982
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to host malicious content or redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and link farms points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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 http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16095294eee68a---nekitirududagowakugi.pdf In PDF document text
    • https://booknowrentalimo.ch/userfiles/files/56311776676.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092d5eeaece9---73321753769.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/kurukabinowopelomira.pdfIn PDF document text
    • http://hyundainhapkhau.net/upload/files/27990170608.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/28d32c263e7622a31e2af5901f093987/37754618199.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/a4c43fd179f0f7b2b4af89b576bcc30b/bepev.pdfIn PDF document text
    • http://eramaztravel.com/bot/ckfinder/uf/files/76934329420.pdfIn PDF document text
    • http://portaldo.eu/contenuti/upload/file/mazalaba.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607edf488c592---bewivadakinifiji.pdfIn PDF document text
    • http://www.bash.cl/media/file/zazofira.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/76217877476.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/1ng1fpm64h4j032me3vp78gj51/lenisapodola.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16115cc63563ae---bizoz.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/635c802ec450aa3a91ad2fac7d7c76c5/xonuwineli.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b5a89e4de---roxosuzibasodoz.pdfIn PDF document text
    • http://sasolution.kr/userfiles/file/gopitavifewaxutoxemo.pdfIn PDF document text
    • http://compufoxmail.com/userfiles/file/93198829552.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/8701392225.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/repex.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/14692525955.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/51773795359.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/70251403730.pdfIn PDF document text
    • https://inifd.london/uploads/file/61983487668.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b993f40dbd0---susidozet.pdfIn PDF document text
    • https://www.bussmann-tiefbau.de/ckfinder/userfiles/files/vakupofisumopezipa.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/61165537908.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=zoology+mcq+pdf+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_off0000fc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001141d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141D 18072 bytes
SHA-256: 14939391ecab7b681718787a7a8c4463556984a9d13cd6cf79b249565cd4d12a
font_02_sfnt_off000142a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142A9 10916 bytes
SHA-256: ad0d079773d30fbd72324375f3b07c119ee79480c8e0303114807fec92a47bbf

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