Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d934d9ad4cb0d7…

MALICIOUS

PDF

89.3 KB Created: 2021-07-05 13:35:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 55a2239cf607c5bff4c8f5e724b386f3 SHA-1: d0d0ec8754f354d8221110981ab87695cce45ab8 SHA-256: d3d934d9ad4cb0d73f0030ed29a3883be978aa60b2a3f4e091effbf698cf824c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to various websites, many of which appear to be compromised CMS uploads, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the overall structure strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://medvor.ru/uplcv?utm_term=cutting+branches+of+trees
    • http://allseasonsart.com/uploads/fck_uploads/file/mubuvakukagoxelizegiwow.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e84b22211f---fimibexexifawelozibake.pdf
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/sehgr91r2ps27cn628o8jhpk6f/vofipujaza.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/17a5bc00b82dd2882d27831c42256b86/tibamewigasigozewobolede.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/11818ef16742ffd26dc32e44e9727886/noxesaxesobusebirexere.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/fbac6d6e00ebaaac46564d37f906776a/buwuxezojifir.pdf
    • https://armagedonspedycja.pl/files/file/menezelolad.pdf
    • http://breakevenpoint.pl/uploads/editor/file/zavupotugebifivulizives.pdf
    • https://hpsoft.shop/upload/files/90374808013.pdf
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/703a14127aa9895acee6b31dfa286358/vugolisorujol.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d04bc19d7e---34738673851.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160948ec35177a---27200637218.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/95its95qrfciknbbonkm7sc6lq/kixazuzik.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160da2af81bdc3---48166088881.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e254b5947b---rafifuviraxeminibobu.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e07d44bac1---nogewoxagijapineza.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/dilizofatujozij.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b1342622c3f---suxove.pdf
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b40751d40---wopodosisuf.pdf
    • http://shinies.ru/img/lib/file/83836192354.pdf
    • http://drjoecarver.com/clients/49355/File/85946235985.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5142147989---vavowidimapuxi.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c03b92c4d3c---lijotulijotomavez.pdf
    • http://allaboutdowney.com/userimages/74140876857.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160cfafe3a1379---27785538868.pdf
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/62540132755.pdf
    • 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_off0000fa46.bin
7a9e8bbf7313ff23427dd1c4401cfff6a8ea277e05f4200228533db18bd4a014		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA46 17028 bytes
font_01_sfnt_off000126d2.bin
8c95db749c1e72f8c0b7bc3b26d07984058c59fd4281ad65754cd94cb6f8c4ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126D2 10840 bytes
font_02_sfnt_off00013fdf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FDF 16792 bytes

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