Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee9e145b2491fc1…

MALICIOUS

PDF

75.0 KB Created: 2021-09-07 17:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7effca9720cb9586fabdabc9b31e0f5d SHA-1: fa7a755c8f6ccc7c43e13637dc663faf5d2699e1 SHA-256: eee9e145b2491fc15c1d88185d28135bb245b6f5db6215fc63d73d547c88f3b5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous external URIs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs indicate it likely attempts to redirect the user to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://allytemp.ru/uplcv?utm_term=greased+lightning+piano+sheet+music+pdf PDF link annotation
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1609c239471ec1---xugaferuvodip.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16073777e2f38b---pijitemotawuto.pdfIn PDF document text
    • https://mmszke.hu/files/file/2356522864.pdfIn PDF document text
    • https://i-try.tw/upfile/files/2021/09/04/kipumulij.pdfIn PDF document text
    • https://regiefranchet.fr/userfiles/files/piwefawewugikesiw.pdfIn PDF document text
    • http://studiolegaletrotta.eu/userfiles/files/noraxadavimena.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b59d3631e---88689896951.pdfIn PDF document text
    • http://safiorida.nl/operatori/userfiles/file/malorizopivadi.pdfIn PDF document text
    • http://draftingfloorplan.com/ckfinder/userfiles/files/2135971328.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/64b5ec92e24d099a666550948bf176f3/pokome.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/gowipinixojiri.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/dbb255ce0dfafb4ed8c4525c2a067d53/balogu.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/33fdb9b497f1cdcf49ccc95f54cd1355/667498529.pdfIn PDF document text
    • http://teknis.it/userfiles/files/papejobo.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/furarurudoti.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/38010067642.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/nudobixojeluzi.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab01c900ad1---fukuvamowolezerekanaba.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/212e09437f66dafeb07c73d26a45948b/34036990551.pdfIn PDF document text
    • http://www.otevrenysklep.cz/ckfinder/userfiles/files/18539297016.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/t7279td5r9r4uehs3kspnohu4c/97123999171.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a35ba455c---sudelisasefarawuvija.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_off0000c067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC067 11208 bytes
SHA-256: 6af07b154b83c8c38688f49995207acf1c897f6f8250d617074b98fdec846070
font_01_sfnt_off0000da34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA34 17100 bytes
SHA-256: 89fd53cba9c257ba9a22d99f8f6d199a30b15201b467d75185ad7e724bb4dcb2
font_02_sfnt_off000105f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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