Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3aae7595753543…

MALICIOUS

PDF

102.0 KB Created: 2021-09-01 05:58:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 9a447dbe056e0eea266cd447890ee925 SHA-1: ca8a73cf2a5d64b0c5ef2cf8f0072070916ad99c SHA-256: bd3aae7595753543ad1a65f26aa585ea0611759198aa3c4e12ce6377d76533f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to websites hosted on compromised CMS platforms or disposable hosting, suggesting a phishing or scam campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this. While no scripts were explicitly extracted, the nature of the links and the ML classification indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9858

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 https://coretry.ru/uplcv?utm_term=born+with+silver+spoon+meaning+in+tamil PDF link annotation
    • http://stattus.com/assets/file/21164866942.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/95194685151.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/31921650733.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/nukafex.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/jipazalupebeda.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608639d598da7---tijivovuba.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/sutizavosup.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a46301269---3138239264.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5db566266---53620642579.pdfIn PDF document text
    • http://beytarimcilik.com/admin/editor_resim/file/jakoxubo.pdfIn PDF document text
    • http://www.moyekolodin.com/files/12295300037.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/87e1272480cb132cd9c2ae1747550900/detif.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/f8c1569867b0581b345a5e1965860aaa/xaminogugewexaperibe.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/50379a02242bbfb62dd290ae301a71c4/76049614003.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/50618245801.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/16930904687.pdfIn PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/21951222249.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/garomi.pdfIn PDF document text
    • http://npas.ru/pic/file/84930182575.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/21549633166.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/2673599329.pdfIn PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/motatipesaveg.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/3b72dcc6a71f8abeb26c9795fe883db6/xesasevov.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/61149996614.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/19311247885.pdfIn PDF document text
    • http://1-sanya.com/blog_images/blog_/file/kifijofavugedulisisapebez.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F5 10904 bytes
SHA-256: efb8157af208bd1522abda5f5fdd0126a5c0b4133ca2d2b8f169f469ce961de4
font_01_sfnt_off00012d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D12 23188 bytes
SHA-256: dffddeee6125a4d12c08672cfc3f9b0acbc09f2d55dd192225dcdf3154e7f4ea
font_02_sfnt_off000167c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167C9 1820 bytes
SHA-256: ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c
font_03_sfnt_off00017053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17053 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1