Malicious PDF — malware analysis report

Static analysis result for SHA-256 003fc60713fc56b5…

MALICIOUS

PDF

97.4 KB Created: 2021-08-12 05:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c1eac2a2ff855b415611408dd342e46e SHA-1: 57f5256669788bf0740d24ce07aba64b75ef3313 SHA-256: 003fc60713fc56b5a73003d696ebac037c73ebc1774fd8fc7a92cf8f490df328
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://chcial.ru/uplcv?utm_term=hermann+hesse+journey+to+the+east+summary PDF link annotation
    • http://cathyknightwaite.com/ckfinder/userfiles/files/zogogufavabasijafip.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/c0db9a0158336348f39f0bafa86c7858/26630921666.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/4571560320.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5e65ca5e55---fexikinejudu.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160918f0a98136---65953529002.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/bumakaki.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16088b90cb786f---62539523821.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9f2f402d8---pagapusororapam.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/74b14ba30d6fd8f7c94ecf2e1e333b1f/bogaxidulixuwuluvez.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/3353bc223b4e23539bb3f8cb0913280a/94608753025.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/83224dbd9f017e459aefd24cd9bd18c8/jadibabujomuxirotokafixej.pdfIn PDF document text
    • https://maplesservice.com/wp-content/plugins/super-forms/uploads/php/files/4038cca2a87377ad0a684f891d1c1473/94668659386.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/8cfad4f29d862daa0760afa7faf4c332/gawuwifosakeduro.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/pikopupepisabuzanawufad.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/30521587707.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/rotorojof.pdfIn PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/koxevebakesipema.pdfIn PDF document text
    • https://www.soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images//files/jejoxetop.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/3suu5se0itj1mkpdu289p6235h/31018016520.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/4e30a3806a76634e89904fd30bb938fc/5782681040.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/962236429.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/146a8865488ccdf5df84136b88facfa8/68209772538.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/c87db4cbaf9d0883646e3024243b0c6f/57064465015.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/siwex.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/vamunulutolaxowakubixug.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_off00011765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11765 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7C 10568 bytes
SHA-256: 49855be8e4550118caae71d1d3d282d347fd26c32c2443a8e92fbc804a9ae10c
font_02_sfnt_off00014766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14766 18172 bytes
SHA-256: cf1b0a7a21004bf8a9be83cf652c4d7ab84244c0eeebdca6d39fa32bb2228513

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