Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64af539be41ec35…

MALICIOUS

PDF

74.7 KB Created: 2021-09-06 07:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ca532c464f28fadec1d6df13f22e7ca1 SHA-1: 49a60287624373253b2fc4ec277bda5ff0e0e368 SHA-256: d64af539be41ec3544f4a183d912b814ef022f271fbbde5afbed087eb0e5bd0e
154 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on compromised WordPress sites, designed to lure users to download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing and trojan activity. The primary attack vector appears to be a phishing attempt leveraging a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7043

Heuristics 5

  • 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
  • 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://garglob.ru/uplcv?utm_term=arm+assembly+language+-+an+introduction+pdf PDF link annotation
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160955c10968e2---30159016622.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d53665e698---gomofivuvorop.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bef4510bd0---mobusokoridegafigavajore.pdfIn PDF document text
    • http://soles2walk.cz/data/file/80740474377.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16071269c73ec0---mixemagewezibadokuvi.pdfIn PDF document text
    • http://flexinform.com/hirlevel/file/22016243042.pdfIn PDF document text
    • http://vodnik48.ru/content/file/wetinalirewofubiza.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/61622058388.pdfIn PDF document text
    • http://sterenstein.ru/userfiles/file/vimepagosu.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/foniwutiriboxa.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16086da629c858---weferovidoleterajazowo.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/rufivelexuti.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/r6hj1qqneukjoc4bqe29ee9dgr/zegaxo.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/59612605460.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202107/file/1626637571.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/4a940ab46b83ed277ff08554f0bc9847/sutejumozej.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/81298627833.pdfIn PDF document text
    • http://bannails.com/fckeditor_userfiles/file/jonafumofi.pdfIn PDF document text
    • https://enkaotomatikkapi.com/depo/sayfaresim/file/kibaxunonovefixavaxufiz.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/punilasisagukaturire.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///lazedebi.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf4ec40a608---pigadaxuzitubit.pdfIn PDF document text
    • https://aquaprosmart.com/userfiles/files/30769908314.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/52989677181.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161294eddecb17---93727360974.pdfIn PDF document text
    • https://goodline.by/userfiles/file/tibodutuluvexetijesiv.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D3 18040 bytes
SHA-256: c50a3f31e4988c4d4da663b9a23b4da49e5b31b4edad268fe3e07a335dc3ade7
font_01_sfnt_off00010392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10392 11332 bytes
SHA-256: b40d148a7c6c1f2cd4a120777c2ba27d9898a14d42411a2400ed0b963297d7c3

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