Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee412b5a009486a…

MALICIOUS

PDF

85.4 KB Created: 2021-09-04 20:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 602c9e40054a74f5c4a26dab13e9c75f SHA-1: a907721cc0763a42ab013e3a4d99ec86a9a8b988 SHA-256: 9ee412b5a009486a5be40d256c451ca1c0a8eb4ecc72fac202a14cadc3d834ad
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is structured as a link farm, likely to direct users to malicious content or phishing sites. The presence of external URIs and compromised CMS upload links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ketchas.ru/uplcv?utm_term=herpes+zoster+oft%C3%A1lmico+pdf PDF link annotation
    • http://qtjdb.com/UploadFile/2021/07/24/file/20210724_225850_107.pdfIn PDF document text
    • http://jcon-aps.dk/userfiles/file/64367041477.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/20512148520.pdfIn PDF document text
    • http://zae.me/datafiles/file/38378995342.pdfIn PDF document text
    • http://sportingfoundation.com/uploads/file/97151157479.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/nodufofiko.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160821274bd65b---86354142164.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/24acc555fdf06745438955dea2c5fa92/pozubof.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/66957814720.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083221ae2cc2---debaxotawe.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/21931487031.pdfIn PDF document text
    • http://bakoca.hu/files/file/zoforilelisipope.pdfIn PDF document text
    • https://rhodium.vn/uploads/news_file/roserawuxizuworutesudumi.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user//file/_0656257001629293303.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073697b7a7c9---33900256479.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/b6dee164bedc617bcb85937f648989f9/65256632464.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e954b82eb1---rajuj.pdfIn PDF document text
    • https://mimpishio1bet.com/contents//files/wanajefoxefobipuk.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/fisorudowalezatukizufulox.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/tazoton.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/23553146536.pdfIn PDF document text
    • 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_off0000e4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C0 19092 bytes
SHA-256: db419c77c36e826c7094bfa19c3e12efa70503a46bc8c5e4412ccf3a1eb5b7d7
font_01_sfnt_off0001152c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D43 10744 bytes
SHA-256: 5570979043fc9be359c37d368fc7978e7cc31b4253c2c8e5141b4d5c556531da

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