Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae58fe601009734a…

MALICIOUS

PDF

83.7 KB Created: 2021-09-03 10:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 70b90d120ee3d0c32d5b74426c0dee39 SHA-1: ed9492788b73acaf5b7743601f7f41324c507fe2 SHA-256: ae58fe601009734a7579cf01c9f11545a98b6e1295a063cd25110b60cac94b61
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=self+leadership+book+pdf PDF link annotation
    • https://damiel.eu/userfiles/file/42816965715.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/xarepupegevuduneban.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d364ed4424---walazepi.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/h7sjhc3pgvtpt5r78nv3daikv3/28340268861.pdfIn PDF document text
    • https://speculatio.in/ci/userfiles/files/lixapeligabikotijukuxate.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/22823671903.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/161287f2289434---83621103778.pdfIn PDF document text
    • http://pechati-piter.ru/userfiles/file/zaxix.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/14250971.pdfIn PDF document text
    • http://multiflex.ru/userfiles/file/73225134874.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740177889bf---67878103862.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16098433d94650---81379535487.pdfIn PDF document text
    • http://keacg.com/upload/files/sirugugose.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/nll6l8k0m1hnv7h1of53d2sfb5/tanexoba.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/vevobip.pdfIn PDF document text
    • http://com123.vn/uploads/file/demamawi.pdfIn PDF document text
    • http://goref.ru/files/file/77442213873.pdfIn PDF document text
    • http://china-miyaco.com/img/file/202152852723.pdfIn PDF document text
    • http://strandedtattoo.info/file/wabidap.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/75127568263.pdfIn PDF document text
    • http://sciattella.net/images/file/68745703002.pdfIn PDF document text
    • http://roletyhanarol.pl/files/file/kutorororutibigudijifeba.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/zobipawa.pdfIn PDF document text
    • http://regalmotors-jp.com/js/upload/files/12600522508.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_off0000e144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE144 18276 bytes
SHA-256: 92347499ad3e474be23318fb8e1d85fa66234b3eb9f4c8f5b93b2b616aec49d6
font_01_sfnt_off000110ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AC 10700 bytes
SHA-256: fe0b6ab076b292ea3cf09f098acdca6e393b03d44e0020c456bb1bcf910b89f8
font_02_sfnt_off00012909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12909 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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