Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba45c2b294ccb373…

MALICIOUS

PDF

91.5 KB Created: 2021-06-29 16:12:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 20a0d4fcbf8025dfe999cf3ed5233450 SHA-1: c9b1bd1aa37db1a3d610a49b838f78a5766dfd22 SHA-256: ba45c2b294ccb37393a03ecc377a72e0fb456061c7cf67cc4878c4701644a37a
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The document's structure and the nature of the URLs point towards a tactic of using compromised legitimate sites to host malicious files or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/rih7tqi9kvnld5ndsku6nas411/zowomulixuvivewax.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/87df71007846274f97ac98f3f2c4f51a/50316183874.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f339881c82---41271253257.pdf
    • https://oklogistic.lv/upload/file/xasunifuwaxalesejixusu.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160accc50ec214---36907632063.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/8d743635702053b259d1e1048bb284a4/27574898987.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/f208932f614b78479e35be46f5b047d6/48497444871.pdf
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/mad9kel6tvnudb2mbh9plh7124/finagewakimevituk.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad969979d7d---28184587710.pdf
    • https://carsen.sk/editor_uploads/system/files/volapurifapidukevejowo.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7d4986011---xatavokibanobakonejika.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16080a2071d378---dubikavibatubefifariwu.pdf
    • https://qnzar.com/files/dogaze.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b37206688f---64285996928.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c9da16a2---4427340738.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/239ed8ebec45498350218013c9ddeaca/xalokasividokirafo.pdf
    • http://veoguidecostarica.com/ci/userfiles/files/20793904847.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/012697dce4d6ea6c3da0d605144afa93/xadogo.pdf
    • http://centreforeffectivecoaching.com/media/file/94389341065.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087282c57bc5---dururilokutupor.pdf
    • https://electrabicycles.pl/app/webroot/uploads/file/16215910704925.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1606f32541f4e3---48054879882.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/2f1a03566831b29282bd89fbe5fc831e/88029740853.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=things+to+do+in+everett+this+weekend
    • 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_off00010250.bin
8f1a640817322d3045154bfcf7bb54ef4beeea445851a72bdc08901e3133900a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10250 17856 bytes
font_01_sfnt_off000130db.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x130DB 16792 bytes
font_02_sfnt_off000148f2.bin
de8b69d83b04f2c07fb7fa6e8e48ccdf777a26116b3ca51ac4565034d925ee36
pdf-font-stream PDF embedded font (sfnt) at offset 0x148F2 10528 bytes