Malicious PDF — malware analysis report

Static analysis result for SHA-256 2beefea8a9d436ed…

MALICIOUS

PDF

73.7 KB Created: 2021-07-06 16:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 73c5aa51694c1df2bedeb1efadc1e5c9 SHA-1: d0045d92b5873e9ac03ee66b91fe2a0542b8a6bf SHA-256: 2beefea8a9d436ed46ecefa1c2bfad298e8a3bda7987a2c04f8557aa4769145f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites, suggesting a phishing or malware distribution scheme. The file's structure indicates it's a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/6f927dd50fcdfecc5333975b440ffced/96768380960.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa4b021f5b---26151432456.pdf
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/ip3h5lai2mmnu5j3n3d3lk5sju/94861312871.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e175c408b7---fower.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/896a202353575deac077107d940b9737/60147404944.pdf
    • http://starsunited.at/upload/files/94976519925.pdf
    • https://didacostruzioni.it/userfiles/file/dofupebesekodutixor.pdf
    • https://hpsoft.shop/upload/files/72443573978.pdf
    • http://lpkgoodframeupvc.com/userfiles/files/57625269444.pdf
    • https://fishboat.hr/files/zuberuzuzovelozebumi.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/5a72203ac6fc95c3ea0ed5124e9d08b1/26358902885.pdf
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/96324546181.pdf
    • http://barcabianca.eu/upload/file/47630619629.pdf
    • http://2ds-creations.fr/userfiles/file/muwesazugo.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/e3ssl1gabovhqth874bnhjf9ap/vorisapomulum.pdf
    • http://i-dron.cz/data/file/38468834488.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f2871124e---gifikoz.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5c69dd34f---71300794611.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/4h5ao40bmlnmor0msgep1gbsl1/redukenadajo.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7cf029545d---82489016088.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/6n6n2ams18g7iq89b32tabdc95/25623459813.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4ceac4115---70432210191.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=finding+the+surface+area+of+a+rectangular+prism
    • 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_off0000bddf.bin
c258cd399e671bbdd259b4b684507515d1bba3a1f45fa9049c760d5e8c09cf04
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDDF 11144 bytes
font_01_sfnt_off0000d776.bin
7acb30bc7b85952ded3601c493f395078b250bbf5b20140d6d0a43a4ea5491f7
pdf-font-stream PDF embedded font (sfnt) at offset 0xD776 16104 bytes
font_02_sfnt_off00010176.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10176 16792 bytes