Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5569a5430e3f51…

MALICIOUS

PDF

93.5 KB Created: 2021-06-29 05:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 51ee2021bfbedab74f0de45878dbeaa3 SHA-1: 9bef02d57593a0629b759ea52084a57bc0d60514 SHA-256: 7e5569a5430e3f511e6b13230a8b59dfd82167f21e19c1e5c884d398da26a819
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The 'SE_CLICKFIX' heuristic indicates it employs social engineering to trick the user into executing a command, likely to download and run a secondary payload from one of the numerous embedded URLs. The document body was unreadable, but the presence of many links to compromised CMS uploads and disposable hosting suggests a link farm designed for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://huntic.ru/uplcv?utm_term=your+computer+appears+to+be+correctly+configured+but+the+device+detected+or+resource+is+not+responding PDF link annotation
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/3ed5bb2a6ed195f08433f7addb2b1104/falefafuvasujikujibasonur.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072100324bb2---63226119934.pdfIn PDF document text
    • http://alptw.com/images/files/99565527494.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/927b81c8b78cbcf379e074ae03f7372f/ravuxasinuremobegijune.pdfIn PDF document text
    • http://ledson.ru/upload_picture/72203217987.pdfIn PDF document text
    • https://lavaecucebrescia.it/file/nibuwejotur.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/e202e5f8a427a6cf8040fa6dca98e5ac/9156648009.pdfIn PDF document text
    • http://ashioke.com/images/library/File/nobexefuroko.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f0473e6ec---81216604907.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f007ca7710---40342605163.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/ncvkv47emdhad6tsbmlcodqil3/39048573148.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/jv70o504q4jum7b7q3jpncgo90/zodubavobijosowe.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c785000cc---78411800993.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b86bbb8801b---kibujiro.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/ki9g5l4uch9gs81heqknit6bre/kutakerotuvixovudil.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/944ae9b6e88dc26b007352f8fd401654/35535829928.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cc04b9699a3---fevurirufiwifuwemoxik.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/e7l2msjj0pt94q97s45rua4uij/zixazefadepipavulasekevuj.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/gakefafofosud.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a6cd70e48---76984405557.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7e41fe6b22702704f8343c472e5724e3/tiroriwitavizuzuw.pdfIn PDF document text
    • https://qualitymattressfactory.com/admin/userfiles/file/54099851304.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/49305884290.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_off0000fae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000112f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F6 29148 bytes
SHA-256: 28a9286af22fbe8fafea38f93ba1709fbb7e8f6bd4598acf86b4313d30c82b30
font_02_sfnt_off00014d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D0E 11468 bytes
SHA-256: 0299c5126ae4356fe0d5c47ae41805dbd2de85ed8e9f73098af82ca6a0c9446f

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