Malicious PDF — malware analysis report

Static analysis result for SHA-256 7449001d10ee35b6…

MALICIOUS

PDF

95.2 KB Created: 2021-09-06 08:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 80cab68d4a9fdc0f3c27f54aeea05eaa SHA-1: 4e9e25c7e6e31243c41fcf3a74683c58f42bce5a SHA-256: 7449001d10ee35b675728ae31d80de2ad2497c09f188ecde2d3972f33e788eed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://medvor.ru/uplcv?utm_term=china+silk+road+project+pdf PDF link annotation
    • http://greathorserider.com/ckfinder/userfiles/files/pudozizigajojoguvi.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867fe5627e4---vegomubazataxojetamiz.pdfIn PDF document text
    • https://emmaushuis.org/pages/fekomemaxisuj.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cc844f21a---85239316200.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/94841715091.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079473037094---79164409412.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d50ee93ae4---99484942185.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/2073012116.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/fijapi.pdfIn PDF document text
    • https://jaiminsales.com/ckfinder/userfiles/files/migowale.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16096b766454c7---98569148298.pdfIn PDF document text
    • https://vettercycles.ch/userfiles/files/tilesoteludaso.pdfIn PDF document text
    • http://vtdsbinhthuan.vn/public/uploads/userfiles/file/86102275586.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/5341362399.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/xorozupuv.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/83351329247.pdfIn PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/49507668830.pdfIn PDF document text
    • http://agedwedfjtj.pretty-match.com/upload/files/temigifolareperejobede.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e43ef06e214---57606311369.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/29770953982.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6bd3c82e5---xokuvax.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c002020e35---regewizozevorolaka.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8aed65a43a---gomezefumazojo.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/43846613197.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_off00010d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1E 18452 bytes
SHA-256: c2ac8013329d322d559be600ee11de730e88a3dd4afae9f5360d66b68651e0c0
font_01_sfnt_off00013da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA3 10968 bytes
SHA-256: a1d385baf8463aaa753398c09f6f71eb66b204d2b5a700891ee6382c55975d10
font_02_sfnt_off00015706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15706 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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