Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a2ea8cf01dd8de…

MALICIOUS

PDF

83.4 KB Created: 2021-09-12 05:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: a15fa6e2e6bb58b461bdf9185cfbaf2c SHA-1: 370b6469268c7cae480ed3c29cd664bc5ad96ef0 SHA-256: e5a2ea8cf01dd8de43f1f085234cb451bedbd6b6b542f6408f67a459eadddbfa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains a link farm pointing to various domains, many of which are hosted on compromised CMS platforms or appear to be disposable, suggesting an attempt to distribute malicious content or phishing lures. The presence of external URI heuristics further supports the attack pattern of directing users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://ediljolli.com/userfiles/files/patijenomuxikexu.pdf In PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd3aba18d1---vidabukilotokiziwijuxe.pdfIn PDF document text
    • http://lachambredechos.com/userfiles/file/verebipi.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/kepureke.pdfIn PDF document text
    • https://coaching-jk-academic.com/ckfinder/userfiles/files/6768421741.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135fa0fe5187---25912709050.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/jivotudowefawel.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/51950529584.pdfIn PDF document text
    • https://perfecthospitals.com/ckfinder/userfiles/files/63595343301.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/pavoxuguvab.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/17564439867.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/81008848358.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2b2ecea51---46317566692.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/xisepelup.pdfIn PDF document text
    • https://ekransamara.ru/files/84758365579.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0b36de46b---95555619126.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b8b51eb73---wawelakivufegule.pdfIn PDF document text
    • http://mc-opony.pl/files/file/17298340288.pdfIn PDF document text
    • http://agierresrl.it/userfiles/files/lalapawitaniriput.pdfIn PDF document text
    • https://7foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/67752393096.pdfIn PDF document text
    • http://polaryachtmanufactory.com/res/wysiwyg/file/woniwubifosogizami.pdfIn PDF document text
    • https://qualitygums.com/userfiles/file/87494477350.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/kolokuzefa.pdfIn PDF document text
    • http://chothuexeninhbinh.net/data/dulieu/files/24915317139.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=asphalt+9+highly+compressed+100mbPDF link annotation
    • 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_off0000dbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCE 11436 bytes
SHA-256: 13ae6fa30db53a4c08bc1e21df9a7074eafebc7c0eb7a583e73eb5addbb1e570
font_01_sfnt_off0000f684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF684 18816 bytes
SHA-256: ed0593faa0631da1152471a6af8a8b095536f5056206358ce7acef6a9e57861a
font_02_sfnt_off000127d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1