Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49eae4149ef6de6…

MALICIOUS

PDF

62.4 KB Created: 2021-09-13 10:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f28007d75eb0567dec831c35d6b2f518 SHA-1: 331a02a730e435fe51b2235be07e12312142986b SHA-256: a49eae4149ef6de6fa97909bad736f1ac27bbc7a031a8817869de3db76e1be6c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9122

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://anduong-nhatthanh.com/uploads/news_file/kewagoguxivofadebuvaseze.pdf In PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/sitokevadanimifapunemoxus.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/zujipiwabovuge.pdfIn PDF document text
    • https://beautydent.hu/editor_up/57538421255.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/nogokodixuzalitusa.pdfIn PDF document text
    • https://wwa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/5308205307.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/tutudizawofuraxu.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/vajadosibugi.pdfIn PDF document text
    • http://www.puhito.hu/uploads/salizelogekavegujaguwu.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/kefotexija.pdfIn PDF document text
    • http://vuoncotichdep.com/upload/files/76942593890.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/45173871246.pdfIn PDF document text
    • https://cancelaria.pl/galeria/file/vijodikul.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0a2687825---94637526354.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/rebukizixevib.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/17193267084.pdfIn PDF document text
    • https://vas-vill.hu/userfiles/file/vujusuxejagavevoxadonu.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/388c8909dc43f8cdab107c8b5b978789/diropibebifi.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/puwimigetijifakorelo.pdfIn PDF document text
    • http://leguido.net/files/24083837629.pdfIn PDF document text
    • http://gldbirdgel.com/user_img/files/fevofusatipemivod.pdfIn PDF document text
    • http://gdgom.com/upload/file/210912044708916971ti24g27lh0l7.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/tipusedomulovizifo.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/11243037502.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=auto+increase+instagram+followersPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE001 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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