PDF malware analysis — malicious · 7e98fe4e0d0a1c9b

MALICIOUS

PDF

70.5 KB Created: 2021-09-06 07:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 2d8ca141bce6444e711f763438fb610d SHA-1: e175bb90f98090dfd0e2ff79c00b8e89068893f3 SHA-256: 7e98fe4e0d0a1c9b27d2287fd892cb8aef5a4a349fcebc34fa0eec2a35667ead

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a Pdf.Phishing.Trojan detection. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to external sites, likely for phishing or to download further malware.

Machine Learning

Nyx PDF Classifier suspicious score 0.4796

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.

Filename	Kind	Source	Size
`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`

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