Malicious PDF — malware analysis report

Static analysis result for SHA-256 58b1e30a876b8759…

MALICIOUS

PDF

96.1 KB Created: 2021-08-07 15:44:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 134efbd7c817372452b5041ee5db9add SHA-1: cc7e777f895e06e7e51a30b59f1777a0d7128eba SHA-256: 58b1e30a876b8759e375f43e025b7bc4cad73d4b250adadec0f2fe7aece0e9c1
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS uploads, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of 'cmdl16cqr07da5h8979sp9r5/tisatorunomutofad.pdf' in the document text suggests a potential command execution or payload delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/618e018dd66f0870b2b851e0d065f49d/rusimifagipi.pdf In PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f197c1a51f---62091210853.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021062009090038.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/46b0dd5899614161d2667322dde31dd5/23025216453.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/nixekovegotikam.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac9d55f46a---vonujujuridemofuwogaxi.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/qdcmdl16cqr07da5h8979sp9r5/tisatorunomutofad.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/o0e7ps77j1o4ouok21andk8g1l/31920818390.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/40509459615.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/3d394cad51212668d7c1dfbce86f5c4e/bipuvodobet.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/mofezazuxire.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/71997881811.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/ije5r88ov1fnfu6rdhbrsuoll7/36467130694.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/5d728c8b31dab716d468f8dc111de4dd/37302457438.pdfIn PDF document text
    • http://kusadasidentalclinic.com/img/userfiles/files/49264615591.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/muloje.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/gizedegapi.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/rol6br1t6f0fo29gf27pqegovg/foruvebowuniboxuzezomaf.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/0m604b0emsttqvv6507i288ivp/keziresitiv.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/58349292707.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092016c2b6f0---getofewenekugatetewigexop.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/qdslns3aqoreq447i5cik97b04/40507987741.pdfIn PDF document text
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/vf270rp3scgdj6et0k2rh3rrv0/28460853949.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/c43c3f789c24242b6a68955669bfdf85/7824660299.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=restaurant+safety+checklist+samplePDF link annotation
    • 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_off000114f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F4 10976 bytes
SHA-256: 136100db0da674064d2b1d0fbf8da01c7ea95697fd28aa2ccfa4d4aa931b7234
font_01_sfnt_off00012e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001465b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1465B 16804 bytes
SHA-256: 0abaa5ac91b17c9ab513f604c9034ff0aad6ffa3b543c44d613b175b1952e9d3

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