Malicious PDF — malware analysis report

Static analysis result for SHA-256 5651489dce6b5f60…

MALICIOUS

PDF

74.4 KB Created: 2021-09-14 14:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d6a33e96ecacabf6d63450db561d5022 SHA-1: 7534b9798e113bd7b466a61efe5551f027904bf5 SHA-256: 5651489dce6b5f602bc57e5be478ea32e1e8be9f14a7ce6f47be44afddf39245
172 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to exploiting vulnerabilities or delivering a payload via the embedded JavaScript or linked content. The presence of a download button lure further supports a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cructi.ru/uplcv?utm_term=pokemon+emerald+version+for+android PDF link annotation
    • http://xn--franzsischebulldoggen-lec.eu/userfiles/file/88674273147.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/minipezufixa.pdfIn PDF document text
    • http://tgroupsrl.com/userfiles/files/23252658683.pdfIn PDF document text
    • https://airin.lv/images/userfiles/file/lizase.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea46ebe514---29334829863.pdfIn PDF document text
    • https://www.esicm-old.org/admin/lib/ckfinder/userfiles/files/88878089331.pdfIn PDF document text
    • https://hotelcorona.ro/files/49445760034.pdfIn PDF document text
    • https://csmgh.net/pevron/www/img/file/91917477915.pdfIn PDF document text
    • http://balbu.hu/uploads/news/file/11871873115.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/savixon.pdfIn PDF document text
    • https://robodom.si/files_vsebine/pumunaxozifizixatuti.pdfIn PDF document text
    • https://tahubunting1.com/contents/files/23188435565.pdfIn PDF document text
    • https://goldgreiner.de/userfiles/file/25239410188.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/88399566265.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/vadagemu.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161381a332e393---20611690503.pdfIn PDF document text
    • http://www.heksan.com.pl/file/75683971618.pdfIn PDF document text
    • https://pecsikult.hu/files/file/pavopizavenofaxo.pdfIn PDF document text
    • http://rezidencianestor.sk/app/webroot/files/ckeditor/files/88395007456.pdfIn PDF document text
    • http://snft.ro/media/file/dunesadunufugezerewidupim.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/161303f105084c---24052512817.pdfIn PDF document text
    • http://zpkprzemysl.pl/ckfinder/userfiles/files/61713848451.pdfIn PDF document text
    • http://www.martiusstaden.org.br/js/ckfinder/userfiles/files/1211259054.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/files/63965111709.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134e8953022a---3960471946.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_off0000c1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E0 16236 bytes
SHA-256: 82262c2efdeb5579168f6554feeec894b9e910934c1e1ef0705e0a71e39d5093
font_01_sfnt_off0000ebe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE0 10576 bytes
SHA-256: db1ace663780c87f8141c6dae2e0a63cbbc05dd402da66497b11c816a8741cb8
font_02_sfnt_off000103fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.