Malicious PDF — malware analysis report

Static analysis result for SHA-256 024295b7c5bc1fcb…

MALICIOUS

PDF

71.3 KB Created: 2021-09-19 00:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9006b034fc90345e21c75c4bfe804ba4 SHA-1: 52d860c53be7d745b629c29e0a4604b8b47533de SHA-256: 024295b7c5bc1fcbeda8e49d7583f3a6fab9918048f0cffabaf53c77ed0f4fd4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://coretry.ru/uplcv?utm_term=ben+10+up+to+speed+download+for+free PDF link annotation
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/e5b1a324b90ed3771b38c8512b6fb1db/405626910.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c45a1c9edb---80945071967.pdfIn PDF document text
    • https://x-leather.com/radsportfiles/file/mavopebugawapolozixawub.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/24013750315.pdfIn PDF document text
    • http://codienlanhminhquang.com/upload/files/buwawinuxabelarowuduxeb.pdfIn PDF document text
    • https://mimpishiodua.com/contents/files/95240295741.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/45654998604.pdfIn PDF document text
    • http://thuocamakong.net/userfiles/image/file/tozematufomosuguvitif.pdfIn PDF document text
    • https://il-gusto.com/images/file/69577920674.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210908_78968BE5C3DE0852.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/161340919707da---35255122044.pdfIn PDF document text
    • http://tythb.com/uploadfile/files/37789429257.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614186c572eec---46820982633.pdfIn PDF document text
    • http://bangkokmagnetwire.com/ecodev_test/image_system/files/96435480069.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/22017357472.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/88110490311.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/95385619070.pdfIn PDF document text
    • https://ssmavidiyar.com/public/content-images/files/82382851497.pdfIn PDF document text
    • http://cncsprings.com/d/files/tozobado.pdfIn PDF document text
    • http://kayapalinakliyat.com/file/pilokisagotekoxujakalula.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/xifemuge.pdfIn PDF document text
    • https://zakarpattya-tour.com/upload/vupiwenajaparivusewevuli.pdfIn PDF document text
    • http://www.xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/32550104381.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_off0000b5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cdb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB6 16160 bytes
SHA-256: 952af5a93766975ff3421318edfe86ff9cb424ffccbdc4b5ef82035f934ab095
font_02_sfnt_off0000f645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF645 10812 bytes
SHA-256: 5549c7ed0e78ffab83b7a2a92b8ae0943cdb9867af23682c06f47343f6d8037d

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