Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb8c8f1c5e72ef4…

MALICIOUS

PDF

80.2 KB Created: 2021-09-04 13:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9390df705f2fe1f15e0a1a5f22a6e77f SHA-1: 1019e2b74fadc73ec3e8d8528ed6d8c737d8a72c SHA-256: 1eb8c8f1c5e72ef414f665da0f1c569a53507f8db721a31c6d52402c5e15a010
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links to compromised websites and disposable hosting, indicating it functions as a link farm. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 http://ibshospitals.com/userfiles/file/86915047120.pdf In PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8nnruhg3o6l81142a1i7049lp5/366046398.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/47533181587.pdfIn PDF document text
    • http://flynewsletter.com/uploads/file/zuzogukato.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/renagexetasolos.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/kupenosanugegomamovi.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/tekok.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f338a7c5e7---lizuk.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/lupekavomorosutunijez.pdfIn PDF document text
    • https://majubesar.info/contents//files/27148379193.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d49d28d084---donupimotukilemupiwow.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae366884b2---5035164154.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160abf6690ddfc---jovasalogatugavuwag.pdfIn PDF document text
    • http://meta-min.com/files/sotefefagazeserokenegoni.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/juxetuwipodimugimubaw.pdfIn PDF document text
    • https://gangnampools.com/contents//files/34953678028.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/24097180305.pdfIn PDF document text
    • http://socialsipahi.in/assets/ckfinder/core/connector/php/uploads/files/52272290048.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608df1efc1929---tozik.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606c672437608---jemeni.pdfIn PDF document text
    • http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/56558213707.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/mawaw.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6453e7f766---11001043821.pdfIn PDF document text
    • http://giasuminhtam.com/Images_upload/files/sanipomodamezuxibesijudij.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//60049764524.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/fisarojov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=different+food+groups+and+their+functions+worksheetsPDF 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_off0000d2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB03 11132 bytes
SHA-256: 39d01e6dcdfca3740df8755b78493f5ed882c428dc1001f92c9b88015054185e
font_02_sfnt_off000104d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D7 17504 bytes
SHA-256: fc702143169fd5516842471c8cf27dc3ac378f8eb0d7b62b9b9111124f02588b