Malicious PDF — malware analysis report

Static analysis result for SHA-256 30e6b6fd1f39bc91…

MALICIOUS

PDF

101.5 KB Created: 2021-08-14 11:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e039b5ee47b306b76cf952379f03b34d SHA-1: f0408abb656aecc69852196cbcef9c7a67ca4ded SHA-256: 30e6b6fd1f39bc912ae75ca6a8e5f86802dc1aae2033d2750a1d7dc353cd27b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • 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.
  • 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://chcial.ru/uplcv?utm_term=does+vinegar+kill+ringworm+on+surfaces PDF link annotation
    • http://naviway.su/upload/files/6023309254.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610871c80dfdd---75014105512.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/zuluwitaxubitatomoxuz.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ecf74b11330---rudetavib.pdfIn PDF document text
    • https://anfauglir.com/images/file/15437801447.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/122dab6cb1003d17f70dd97c920d07cd/tebejuredan.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/87735727865.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/wazojepijilukokizadimek.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/tusasibizepezevujuratefun.pdfIn PDF document text
    • http://phaptangpgvn.net/app/webroot/upload/files/46594077263.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/66472536977.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/xaduf.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca2e9edf22---56211200390.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/76300803600.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/uh4gesipjac6rlub4iqmgb7ind/74919822505.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/jowopupiwaxefetibokomen.pdfIn PDF document text
    • https://wilocom.ro/ckfinder/userfiles/files/wifobirimitositaresim.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ce4132486---98881167671.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/14f0d829f28976d4601b85f6523e67b0/nowiwuguj.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/3125403750.pdfIn PDF document text
    • https://telenovella-bg.com/files/63772495956.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios//files/59349171969.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_off00012af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001430b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1430B 10924 bytes
SHA-256: 72d57b013fd76c3c12c9cca871e0e67589e00e8228a392574c89bdc10d624ff6
font_02_sfnt_off00015c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C6C 16560 bytes
SHA-256: 9647ac92396d25446fdee8e9656a7576d64bcb08a295480e6bd0cea29d1456c5

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