PDF malware analysis — malicious · e23ca58836742ea0

MALICIOUS

PDF

89.0 KB Created: 2021-09-28 12:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 1b547f0637e4928215c97b9349768c55 SHA-1: c1dc408dfe8ac8fc3e7e98997b9a20604d8d9693 SHA-256: e23ca58836742ea0137ec6c228335710a43f600efc81036123653d4a109856d8

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file is identified as a phishing trojan by ClamAV. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS platforms. The primary purpose appears to be directing users to external, potentially malicious content through a series of indirect links.

Machine Learning

Nyx PDF Classifier suspicious score 0.2936

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://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150cf4501d83---27329566559.pdf In PDF document text
- http://greenflameenergy.com/userfiles/file/52356518641.pdfIn PDF document text
- http://hawaii-resort.info/images/blog/file/78006049959.pdfIn PDF document text
- http://baominhlabors.com/upload/files/72609783077.pdfIn PDF document text
- https://eastmangroup.org/ckfinder/userfiles/files/95896710891.pdfIn PDF document text
- https://chief-moving.com/editor_upload/file/giduxowedirixunisojile.pdfIn PDF document text
- https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/d90c22fb58f25ec5385ede59c18f679f/74157252324.pdfIn PDF document text
- https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161512505adb4a---31377432959.pdfIn PDF document text
- https://pielinks.com/UserFiles/file/wozavowus.pdfIn PDF document text
- http://degeninhotel.ru/admin/ckfinder/userfiles/files/13559986426.pdfIn PDF document text
- https://eric-parnes.com/ckfinder/userfiles/files/52759311032.pdfIn PDF document text
- http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614bc1e4aa736---28855102527.pdfIn PDF document text
- http://skipjackpoke.com/ckfinder/userfiles/files/sumexetegotamabit.pdfIn PDF document text
- https://www.luthier-auxerre.fr/ckfinder/userfiles/files/jimedilijexodekav.pdfIn PDF document text
- https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/d2bedec502f551e4d7938ebf2b7e8bbf/77072149194.pdfIn PDF document text
- https://rainbowprinter.com/app/webroot/files/file/puxiri.pdfIn PDF document text
- https://gamepinleri.com/calisma2/files/uploads/puzijupegetasibubidavogaw.pdfIn PDF document text
- https://nutstudio.it/userfiles/file/nunurewikuparomatuj.pdfIn PDF document text
- http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/161361d256da8c---74555076424.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=redmi+note+9t+geekbenchPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e11e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE11E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f935.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF935	10788 bytes
SHA-256: `c5df64b6311b7cd49b6b7f618dc06fa226e7db4c8fee38303fd5a69a2272bcc9`
`font_02_sfnt_off000111a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x111A3	16188 bytes
SHA-256: `800554d3d6320da9c8ab21a3ad3d270f40e7a92360d7538c059d647d952d1d34`
`font_03_sfnt_off00012755.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12755	21612 bytes
SHA-256: `95e1476665069b673416388a6953764be2913d867171ff0e86df9eda48bad65e`

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