Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30f4c2f3d48b896…

MALICIOUS

PDF

69.7 KB Created: 2021-10-01 07:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f5b44f7c17fb7c213a9e523b5fd34c2a SHA-1: d080a0ce4d1040ed73e3d00269821b114cebd60c SHA-256: d30f4c2f3d48b896bd976b0c9a5080ae36995b9c15e8559111944cdfb661593a
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The file's structure and URL patterns align with techniques used to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://ogledalata.bg/uploads/pages/files/torupisogosufejisonitakax.pdf In PDF document text
    • http://metalzilemboeventi.com/userfiles/files/luwakekanez.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/juzebimukidutabosovozi.pdfIn PDF document text
    • http://realtor-madrid.com/uploades/fckeditorfile/zogumozepigijumajexo.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/78953953261.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/perulibovoguxorasaketa.pdfIn PDF document text
    • http://efuturesthai.com/uploads/files/59051307059.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/033406fa6bca9dbee28dec149c2d8a71/pojorakigigana.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/jubisivanelafeninutopiduw.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9775748268.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/161413b91d3990---70711528416.pdfIn PDF document text
    • https://kristinanamaste.eu/files/wojujerenosagaviga.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/wozovewadaduf.pdfIn PDF document text
    • https://euchebnici.com/img/file/78719099327.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/kegefajovabum.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/lotovik.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/23179267983.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/40067002207.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210910154303.pdfIn PDF document text
    • http://owv-sad.de/userfiles/files/70896978993.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021911142591782.pdfIn PDF document text
    • http://xn----otbbfbbknchz.xn--p1ai/sadm_files/lemilitav.pdfIn PDF document text
    • http://saddabro.com/userfiles/file/xewek.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/21797698385.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/96389356119.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153ac48cd402---koxefixubujagobopivareju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=ley+de+murphy+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_off0000b445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB445 10144 bytes
SHA-256: b226a1c89f111ade840cc9f72feff00dc573fc295b1a8faea438d0c89121771f
font_01_sfnt_off0000cae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE2 15228 bytes
SHA-256: 39c0cf0bb7c3e0d3eaa9b660608d0cdfeaa1d4dd3b32bf7b0ff6334f0b2ac11f
font_02_sfnt_off0000f106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF106 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1