Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c27cbd93669eef…

MALICIOUS

PDF

70.8 KB Created: 2021-09-07 04:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2c3b1e3e9054cc69621a0abdff648cd3 SHA-1: 6af652cbb6b0c0bc9e1f220a1352a1fa219d6158 SHA-256: 93c27cbd93669eefd98d41f190047a532a1c5f9ac811879c3d67a592a7c08b24
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://nomylo.ru/uplcv?utm_term=vaporesso+veco+one+plus+manual PDF link annotation
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/4e7d3cc8f938e0cc8d621efca19fd855/wivefirunotojowewikif.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/zomabufamitajagodozalepod.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/xuxozemanukibimogoparo.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/a97244b789e405cfca74dbd88eca1341/xaximuxinateboxogixixosi.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/ruwudag.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/noxefazimupupavaje.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/kijejuxorowazi.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f138e5e36---67099373624.pdfIn PDF document text
    • http://lawfirm.vn/MINH/user_files/file/10390637314.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096b61bad92d---kasupiwomewuse.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/96554589922.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/dfk33kuufr1kr5odp9bd0227f6/94205075376.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021073123590098.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/2462c4c96c79670dd279b839e8c9badb/54059373892.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0c058ca45---sosusisemexebaxan.pdfIn PDF document text
    • https://peterdegendt.be/file/revumetadamatorul.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072f36dd8484---laguzirotosuzuxanamuga.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/u3cipg4vp6oodgl6jfj2l23n4s/degumobite.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/72079805758.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160849869dc2d4---69770240039.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/19987000905.pdfIn PDF document text
    • http://highdesertrent.com/newsite//images/uploads/file/1525818289.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/50769778984.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/kiv87pklvrtq8rq61t2m0bn4oe/8600572375.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608780b420008---xurifinitefusaru.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_off0000b6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE3 10480 bytes
SHA-256: 08dc0ba671e8330446cb7c879eb30345b0b4a939b33180dbcf496dfc5911d49e
font_02_sfnt_off0000e6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B9 14776 bytes
SHA-256: febe74e79668b0c4428b7753711d91006a663777506808df66e7a1b94c946042

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