Malicious PDF — malware analysis report

Static analysis result for SHA-256 021c0fdee685fcad…

MALICIOUS

PDF

70.6 KB Created: 2021-10-12 02:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 66ccc3dd52c65d3e187df5a8364b955d SHA-1: 21e71d9ba008d2cf69bcfb72fad8947a9220ce65 SHA-256: 021c0fdee685fcad324fce690ecdc474c64840130b6285b3ba9e89585d3d2499
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://oniceh.ru/uplcv?utm_term=translate+verbal+to+algebraic+expressions PDF link annotation
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/sbem66du6gi99vv02ohr9956si/30588639455.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/ratisilisobobaxujitij.pdfIn PDF document text
    • http://recrute.fr/files/files/kafav.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/34762014384.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/b640f24fcf3fb616d486dfaf42e6c203/56944226364.pdfIn PDF document text
    • https://cyc-catering.pe/disac/userfiles/file/binapatuganeri.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/5400686035.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/fixajufufobi.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/fimofibij.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f459fbbfce---63106930513.pdfIn PDF document text
    • http://realtor-madrid.com/uploades/fckeditorfile/fibima.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/95531115197.pdfIn PDF document text
    • http://ruizhishengwu.com/uploadfiles/file/022227364219.pdfIn PDF document text
    • https://equalitas.es/userfiles/file/jisesowofofidupe.pdfIn PDF document text
    • http://joyandwowbook.com/upload/file/pugas.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/6384852122.pdfIn PDF document text
    • http://gaongonmaiphuong.vn/webroot/img/files/junijumimajinakoxujaxejuj.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/pezufoz.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16151ee14b2660---dozolojajolif.pdfIn PDF document text
    • http://bordahusfeldolgozo.hu/editor_up/4680551313.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/daridoxo.pdfIn PDF document text
    • https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/bevax.pdfIn PDF document text
    • http://akbarestate.com/survey/userfiles/files/3592985597.pdfIn PDF document text
    • https://episcopiaoradiei.ro/files/ronixaziwejojub.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/87093589798.pdfIn PDF document text
    • http://inggeo.eu/userfiles/files/sedidevekovudazajasobik.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_off0000b65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB65F 10820 bytes
SHA-256: 6b1dde5e3372cf2fcd254d0f019c9bdfc1ea987ad24662ec857bdb789943ca4e
font_01_sfnt_off0000cf4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4C 14728 bytes
SHA-256: 6658e8f82ed52237b1a8c067f60d85bb1c3e3c4664566df99825cb47961da2db
font_02_sfnt_off0000f429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF429 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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