Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a7b1ebdd0febf27…

MALICIOUS

PDF

90.9 KB Created: 2021-09-05 02:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b34f34d51fb9fab169311b54997f1f59 SHA-1: cb0d531645ee89d114d4ee71e6334350ac5756e9 SHA-256: 0a7b1ebdd0febf278fa5a4198d53c327f282a787322e253758e5e3ab158a3346
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating it's a trojan designed for phishing. Multiple heuristics point to the document containing a link farm, directing users to various external URLs, some of which are hosted on compromised CMS platforms. The presence of embedded URLs suggests an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://nepalipublisher.com/ckfinder/userfiles/files/43594858051.pdf In PDF document text
    • http://sicompk.com/survey/userfiles/files/72876550453.pdfIn PDF document text
    • https://www.lucaslobker.com/minor/ckfinder/userfiles/files/65841806704.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612c2eb097c1b---32228422197.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddb096e4c6b---56792656783.pdfIn PDF document text
    • http://exim5.hu/_user/file/45046118665.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/d983e05720146fbd90b5a872a301e968/87720640021.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/1c93c889e057abdcce8164fa515c6205/bekopupu.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/65236742032.pdfPDF link annotation
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160716b0619071---71733295584.pdfIn PDF document text
    • https://elektrona.cz/files/file/37759293330.pdfIn PDF document text
    • http://udemadriatic.com/userfiles/files/jadopotirepetikula.pdfIn PDF document text
    • https://vieiras.pt/imagensprodutos/file/4189602478.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/c4aed16f1cf2a7429df4eb8bb8ac0d36/fesesewo.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/rugedaxerijujizog.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/4a9813b785ef1e17e4f772fe72a3da9f/93407248208.pdfIn PDF document text
    • http://sns.hu/_user/file/xewujotobib.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1611d0686430ae---vaxakoremoxojowiledexozen.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab74fc441d5---xawazozadujewotu.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/pibir.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/mukafesulapuzopariwe.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e66fc17492---26896592351.pdfIn PDF document text
    • https://ekaplast.site/admin/ckfinder/userfiles/files/36091176338.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/gigitilufosukesod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=badminton+rules+and+regulations+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_off0000fed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED4 17492 bytes
SHA-256: 5ae31765354c2913f0273ba8f91dce027070f1c24ffc9387a8ae586040fa6e2b
font_01_sfnt_off00012c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C5A 10996 bytes
SHA-256: 98df87b46a47b825bba7fee3e9fa0a5a254bf0a190666cd656354a7cabdcd9ee
font_02_sfnt_off000145a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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