Malicious PDF — malware analysis report

Static analysis result for SHA-256 468f06dd60da63b4…

MALICIOUS

PDF

85.9 KB Created: 2021-09-19 04:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 76352493f58c5b2e985f182ab3b2e2e3 SHA-1: 01fb927cb289f61a17a5731376f54b039d88319d SHA-256: 468f06dd60da63b4e40485c532c17813ab6ecb265ecc363224193b7ae1b7b427
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external URIs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://irlanc.ru/uplcv?utm_term=justice+league+dual+audio+480p PDF link annotation
    • http://yuilchem.com/userData/board/file/jodovudaj.pdfIn PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/09/05/16629270529.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/gotiwatukifukalepunex.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/f666b65115b91a674cb7fb96df11e1df/wafenojorojowemekuwuga.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/f61b736d06662bdcd2fe7498af65f867/9551370250.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/aeb70d3b822532d6e29ea7e2f3c0b906/dapimoxuwibova.pdfIn PDF document text
    • http://rotarytattoomachine.co/project-new/christianbook/upload_images/file/23863579867.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///1989664324.pdfIn PDF document text
    • https://markaoyun.com/calisma2/files/uploads/begosizojezizixif.pdfIn PDF document text
    • http://test-immo.com/file/kasopazebebolipefos.pdfIn PDF document text
    • https://adikkedua.com/contents/files/jatojodiwatelamuv.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16134ec3e45ee2---nujijusapasamebim.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/batijodifem.pdfIn PDF document text
    • http://dastone.ru/userfiles/file/17183791198.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/biretexunaw.pdfIn PDF document text
    • https://residenciasanamaro.es/userfiles/files/nifajiwexifu.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/5683eb397bf68109dd19d05cd9102d14/fezatenivirofizenax.pdfIn PDF document text
    • http://coomargroup.com/ckfinder/userfiles/files/2484281782.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/71852080571.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/dutagotagifum.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613245f224529---mojawivo.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/eea0412e48db634144500be08814fcf3/69023664388.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/21218015213.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_off0000e5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BD 10984 bytes
SHA-256: a3f0bb628c7b7cd3a466e736ff99c8c1933a4adb8ff0819ca3a3c863c32161c2
font_01_sfnt_off0000ff3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3D 19460 bytes
SHA-256: 5216b08ce2ff6d1e9064f29a6d5f671885ad490b42767752d6116ae7d546760f
font_02_sfnt_off00013220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13220 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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