Malicious PDF — malware analysis report

Static analysis result for SHA-256 7378dbdc6640a16a…

MALICIOUS

PDF

96.4 KB Created: 2021-06-24 08:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6328fa036f755814625b499f6fab9bef SHA-1: 61805d8d328e31f953673b9737a312acecb09477 SHA-256: 7378dbdc6640a16a54a7650ddc0da84376d3ef4b2175b8aeddd408df5b8163ad
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The presence of 'utm_term=powers+of+cbdt+pdf' in one URL indicates an attempt to manipulate search engine results or track user engagement. ClamAV and ML classifiers confirm the malicious nature, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://cructi.ru/uplcv?utm_term=powers+of+cbdt+pdf PDF link annotation
    • https://caffedisanto.it/file/zidogapumewobex.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082acf8b014e---78233695557.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/325e41866757b43d92d99409c7c674bc/ruvopimipawusenuzi.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/fe8d2a123bf6ffed791e651026853cb1/44548023788.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/5208f51c698f4aca88c56d33034a1a52/nijijofi.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/62ac583c44a089f48209fb98f05d15f1/74613921580.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ba63409f222---kopeduporavetobajo.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/fikulixoxibiliw.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a48ea7a31---16234611091.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/35635c13065ad5d94f61ffd184c9f19b/54896805555.pdfIn PDF document text
    • http://strandedtattoo.net/file/10838720017.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/c3154ccffa00bb21cde5630febd47970/zunawawibadafabig.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9a3736c0d---2687185009.pdfIn PDF document text
    • http://valaptop.com/ImagesVA/file/jitakuxeporesuwufawuvor.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/raveseguwejufozipu.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/i8512a0utu9sh1il8r2ihgqk1s/nilosowupubidinorepiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E7 5140 bytes
SHA-256: 2eb9d4aab92634dbad4c76623ce5426d4071ce74edf85a93f3d33bca0dc10024
font_01_sfnt_off00011982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11982 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off000124e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E6 11132 bytes
SHA-256: 0cc4462aab055dcfe2ce905ba8a2a865ea2aa096acddb192aa608ea6ef95251c
font_03_sfnt_off00014b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B30 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6
font_04_sfnt_off00016083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16083 4764 bytes
SHA-256: ec34f5d35de6fd4ae54bd64a06c781d3a15a0baef44fe937a67bc1210200513b

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