Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7577b8c82535367…

MALICIOUS

PDF

100.7 KB Created: 2021-09-06 07:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cd17de5a9a202d6ae42b7c12a9b7bad8 SHA-1: f2e798cd8576ef20528767d24767652ef62613cb SHA-256: e7577b8c82535367864301bf33ebd39fa2fbb9352df5e65ac0ba02459b980453
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised websites and 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 file's structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://huntic.ru/uplcv?utm_term=business+environment+in+nepal+book+pdf PDF link annotation
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/6a2fa2c57a32f6d9ea8cf1fd374d6e74/buxefexonafaromuvasujax.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/votite.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078b8dfabdfa---5765500988.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/zoseduduvizoxozovom.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/50997996721.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/49eb48a7c02c03865778fe03ec55146b/jepunokufo.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160779cd721cb4---70574837569.pdfIn PDF document text
    • https://qkon.ca/images/file/84187970603.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/gemumevetegotagobanaletug.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1611b52feed101---70704098245.pdfIn PDF document text
    • https://dodatnojamstvo.com/userfiles/file/vulowaj.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba111422c8---82579477667.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/41354545451.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/20837842976.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/6bda73057a11afec3d39f87581fe05d6/xoromakaw.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5efb9710b2---noviwabererusojajele.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/vifodewojepefugemilosojij.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc2c1c852a---rilekovujegak.pdfIn PDF document text
    • http://kleinschadenexperte.com/userfiles/file/pamemexowatobenerazuso.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/2fe08e65267268ba5755a12bd2dd745e/visef.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/49122206679.pdfIn PDF document text
    • http://k9careclinic.in/ckeditor/ckfinder/userfiles/files/rifuxefivirudake.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/9cc5d3ee2f61dd51497692f464ba66a6/35542519413.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/96816757354.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_off00012368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12368 18556 bytes
SHA-256: 7dfd85b403b203226fd6fbc02367df137b5636eee2d4e1b018d9173535aa8546
font_01_sfnt_off0001531e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1531E 11112 bytes
SHA-256: cb7062dc275b046a109f2a944fab6cac85b9aa8ca71970b94d9ed50e9a6434ea
font_02_sfnt_off00016cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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