Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e0149aa9b9bce5…

MALICIOUS

PDF

83.0 KB Created: 2021-09-07 02:00:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 51f25a22e62b718785cd21dde5791dab SHA-1: d2ac3fba60169fbab3a2840b39503ea118b88ec7 SHA-256: e9e0149aa9b9bce564147fb98989bd21b16eced7b4c2820c9f7086ba8e70e993
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is unreadable, but the presence of a link farm and compromised hosting points to a malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zvezda-rostov.ru/ckfinder/userfiles/files/65489895587.pdf In PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/8845723ec7a6f8b7b2abc204454a36ae/terag.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/65656184524.pdfIn PDF document text
    • https://samowar.me/upload/file/52817178638.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf0354099a3---90943265542.pdfIn PDF document text
    • http://keralastatetailorsassociation.com/userfiles/file/74317762631.pdfIn PDF document text
    • https://rajakedua.com/contents/files/47104787291.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073035de738c---14727883321.pdfIn PDF document text
    • http://sbmhavacilik.com/userfiles/file/fuxefafaguv.pdfIn PDF document text
    • https://rockyhotelsgroup.com/uploaded/files/vinowi.pdfIn PDF document text
    • https://datajournonepal.org/files/59396755648.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608fff2d32667---70639108932.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611fc8c58843d---61770496911.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/9ff286171125d68134b8d0ed8bef1ad6/jenesixupiti.pdfIn PDF document text
    • http://zonweringbelgie.be/ckfinder/userfiles/files/16522802002.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/ad3942981458e1b9b46c673d81849a52/pibolewavanilobopozi.pdfIn PDF document text
    • http://pvhs1980reunion.com/clients/e/e5/e5e9f74eb83211af097e98bf68d59c4c/File/gerotez.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f44ac593c1---fetodarujumep.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/8127567528.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/wigulatujomozado.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/f675f160e747fbf8fbf4d8d27b8cae4d/wuxijojaziwisusivar.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/24392452871.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/lowigurajatiluxotada.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/pederenula.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/p4jbpa4d171o9sde62l24hl7bt/kixawejivagajomaka.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/68a565c4d83f18fe63e80e9fd1e19eed/10421821030.pdfIn PDF document text
    • http://bolt-go77.com/fckeditor/userfiles/file/41356324872.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=corriente+continua+y+alterna+definicion+pdfPDF 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_off0000d9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FB 10688 bytes
SHA-256: 1e0a2382f060d0008f3e5fcbfad499ea55fb447ece50a5331985a98559eb47dd
font_02_sfnt_off00010aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA2 19964 bytes
SHA-256: f561dca46ff10bfa8dfc67aeb6ce7e966c01d349a738e45e0cfb48d0593c4177

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