Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d5064db2a582667…

MALICIOUS

PDF

93.9 KB Created: 2021-06-25 20:35:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c1551425ffb67de6d0ee9d190af7cbb6 SHA-1: 5fe87c6adf55ac64d328568fdac37c86699b554b SHA-256: 9d5064db2a582667e667d2002ff26603934fc161f17d9326911dc4039aed2a58
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for delivering malicious content. The heuristics indicate that the PDF acts as a link farm, directing users to compromised WordPress upload storage and other potentially malicious sites. The ML classifier and ClamAV detection strongly suggest this file is malicious, likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://cosmopolitanhotelbg.com/uploads/wysiwyg/files/40008544570.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc0f186ca3---50258703832.pdf
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/39994520419.pdf
    • http://stepsforstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/fesesuga.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afc7aad931a---futuv.pdf
    • https://chachachat.info/js/ckfinder/userfiles/files/78112355871.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/5eeeb119738f1d7634242afcc7891f16/78935527999.pdf
    • http://studioingegneramato.com/userfiles/files/rubukimaku.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ba0f2ac89---bibed.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/243950b2dbff6439368d08ebe309018e/jiwutafusetegux.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072cc0eb4a8b---82568492928.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e660cfa70---zeworaxibafaba.pdf
    • https://a2designbg.com/userfiles/file/zevolikevux.pdf
    • https://x-software.cz/data/file/67768784741.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de58c2f973---vegosobenaxera.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/qj03529gg4864i3v641tlroao0/betikitategugutaxuretipi.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/o8vlc6ferca708os6caqdb7kur/35001115184.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16086dd9f70ea8---57590372049.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c5dd857e2bb---benikimiluno.pdf
    • http://zulaikhatextile.com/userfiles/files/lipefewajunolewazoluv.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cec9c1b003---51983093553.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae2e7d07fd---resikajamizowojetup.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/qr4a1feh714rasrcgr7vkiaj2r/joxitiruridopinirubadu.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fbb3dce06---90710857435.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/kfkc0357nae1rbpla0rcep3tt7/sipaxakujaribolexedoner.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=tangible+and+intangible+heritage
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bd8.bin
0e928aa5738016a479de73d64de7002ce89e4ff3ce7e9733478a00499001bdbc
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD8 10344 bytes
font_01_sfnt_off000122de.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x122DE 16792 bytes
font_02_sfnt_off00013af0.bin
6043658c65a8f062db30f6abeb7f164c3d6a49899785fc4b7f785ba6ff9d0a6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF0 18056 bytes