Malicious PDF — malware analysis report

Static analysis result for SHA-256 220f6a04b16f394b…

MALICIOUS

PDF

72.4 KB Created: 2021-09-06 02:10:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b314ec0335dd5163d8c5c6b8bec76f1d SHA-1: 247264564699191bb477c300f53ad0fbe460648f SHA-256: 220f6a04b16f394b9b434bb22a07c3a99c65577f9da55afef4a2395735de9cf9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised websites, likely to host phishing content or further malware. The heuristic firings suggest the document is designed to lure users through these links, potentially leading to exploitation or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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://pistant.ru/uplcv?utm_term=solve+systems+of+equations+by+graphing+worksheets PDF link annotation
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609430897230a---99619713125.pdfIn PDF document text
    • http://hamandeggsclub.com/clients/e/ee/ee862789ee8b59d3f3d22261ccc35c80/File/13506104266.pdfIn PDF document text
    • http://fskyok.com//uploadfile/files/bogisewimutev.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161354263bf5ee---93035544037.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/salubobopisataponi.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed303ebd2b---7518290497.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/dimabubujidapuxap.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/lojosaletosokid.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/89969518045.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/db54b7d3f3360e928774769fd56e579d/pazelivanofopafizeseno.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///nedusixajokozod.pdfIn PDF document text
    • https://airflow-skateboards.com/userfiles/files/27921113791.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/23882226639.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/kenaropuxanixobugosisi.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/30ff1920a74717f0c4e6a27d82b1ff4f/nafubanapiwa.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/kusidakejafopike.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/92621271636.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f586521124b---62413629350.pdfIn PDF document text
    • https://magnettoptan.com/upload/ckfinder/files/26749679796.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/zusufidojewezuxu.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/pesejasumimu.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/40636789712.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/fbd334fc8e13047f3274ffffcd9763ac/jexumezosagakava.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/9fd6d0845e020b0372b65700d7755cac/malomefunakasip.pdfIn PDF document text
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/72373291929.pdfIn PDF document text
    • https://tempegaring.com/contents//files/pedudilezikulexuxo.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_off0000b791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB791 11624 bytes
SHA-256: 5ac0500f63929a6da03a19fd9c22fb2a685a6271dfbf80a641bc351e49082a4b
font_01_sfnt_off0000d291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD291 16144 bytes
SHA-256: 79cae243ec89c3a36022b0dea6f3cb0101c214c55da648a45772a110681235ca
font_02_sfnt_off0000fba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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