Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d9a9b8e4fc50d6…

MALICIOUS

PDF

78.6 KB Created: 2021-09-01 06:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a98104bbfe05c5fff442ed554d11b042 SHA-1: 633ca0001b74445ccd087f061d4dd5c927f35d0a SHA-256: e2d9a9b8e4fc50d62d6f2e5a3733103ae510a8ab41edbda6b780c21a961b012c
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs that point to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The presence of these links suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/f5c7e45388865b54973bde1b01074b31/bitabapifejarepup.pdf In PDF document text
    • http://dmkaudit.sk/101/upload/file/10829285702.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da42449f5d---5347574386.pdfIn PDF document text
    • http://jkohut.pl/file/59647427399.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/19094049239.pdfIn PDF document text
    • http://ppogrimall.com/upload/editor_image/file/2679458141.pdfIn PDF document text
    • http://emannsltd.com/userfiles/pikonoxelabalate.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/v7qm83sj88tpl9ppcpr4isht28/molinewede.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/budokomikul.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/vadikezuzol.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/63e47488dc5c98f385643bc98c9d0c80/lobamagaror.pdfIn PDF document text
    • http://generoussecurity.com/uploads/kedewevuvedewatidarixufe.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/1d258d43face649116bed05d5ffc476d/10537791237.pdfIn PDF document text
    • http://caigeshi.com/uploadfile/file/2021063014353273499.pdfIn PDF document text
    • http://pitneyclan.com/clients/c/c7/c7afcfad87c307b096642b2e35f52d25/File/10937255544.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/35069903752.pdfIn PDF document text
    • http://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/pojukafifom.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/tifizuxejidisilexelixos.pdfIn PDF document text
    • http://www.tsahimmongol.com/uploads/images/files/25989471494.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/barojazunisigifepiso.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a084fa67737---kixuvafagurasudofevikopu.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/69108810829.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/maburisivusefowaremezeviv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=cost+of+setting+up+a+dairy+farm+in+india+pdfPDF 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_off0000cdc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DD 11040 bytes
SHA-256: e3b640528dc599b39bb8266daa5bbd50ce12b8345078b65ab347e8d599147c24
font_02_sfnt_off0000ff64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF64 17588 bytes
SHA-256: 79ac0f5b468a4efc21326dac0f3d3d029dd816d8baa013f67998789dae306118

Open this report in the interactive analyzer, or submit your own file for analysis.