Malicious PDF — malware analysis report

Static analysis result for SHA-256 b96daf8ba11c6348…

MALICIOUS

PDF

85.0 KB Created: 2021-09-05 21:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0ec70d66d02496db12bd2e2838f87cf1 SHA-1: 70a8cbfbd0c3cfed2f8fda0dbf58dd5f0adf3c2c SHA-256: b96daf8ba11c634893e56f0bb9645be8c13e335dda8161b6d451dd5f80364618
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://catamma.ru/uplcv?utm_term=texecom+premier+elite+manual+pdf PDF link annotation
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16134372cd8fc1---38195124639.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e64277379d1---razamajugeweva.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/a980301ee819b66012d1c299ee65f233/towoxefedolate.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e64bc32e7f---vakuvinefololipidogapurun.pdfIn PDF document text
    • http://adveotec.com/img/file/72952874006.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/67776481354.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/30332722541.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bbda8a264bc---40853003575.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0e303a5bc---gogufozadugaxi.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/60187762500.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/cdaf0c09271c95d88a80aa12378fb4da/26320416161.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/1114899856d711233fe25509a61e8b80/12654460595.pdfIn PDF document text
    • http://accu-chek-event.com/ckupload/files/11251013932.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f269ac36b---fobadumeninosewofisadumub.pdfIn PDF document text
    • http://solee56.com/ckfinder/userfiles/files/josagamagem.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/tijudozetexedaxise.pdfIn PDF document text
    • http://geose.ru/userfiles/file/938080761.pdfIn PDF document text
    • http://www.bluefashion.cz/ckfinder/userfiles/files/wuson.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/migabinadawodog.pdfIn PDF document text
    • http://www.iciparis.ru/ckfinder/userfiles/files/3209194529.pdfIn PDF document text
    • https://nbcmedia.vn/ckfinder/userfiles/files/jibuwikatogewupanifawike.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160dabcc34fc4b---mamimi.pdfIn PDF document text
    • http://hasanmasat.com/ckfinder/userfiles/files/falatoxobomijukojod.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/somuvisekupizugajaxubiwe.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/85d27328d173986d19cab89b38d24a49/zesotuwididaxufajudu.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_off0000ea67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10279 16848 bytes
SHA-256: c8ca05e8b3d50aab35fa671cd412edfe2149a1bbef4a3e9b7c03bb60693b1525
font_02_sfnt_off00012dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC5 10780 bytes
SHA-256: ba7544ac1dceaad65c44b189599611e5729f97d759dffe4769161b379291603e

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