PDF malware analysis — malicious · 3d15bf0062aa1823

MALICIOUS

PDF

70.9 KB Created: 2021-09-03 16:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 857c357404f26c6d6a8e68ac88ff5127 SHA-1: 8e1adeefeb8d5ca7410f1e7aca4f1137d018765b SHA-256: 3d15bf0062aa182397bdd21f0e9ac2903382bb84f2a7fa9a2832a39a5996b85a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, a common tactic for distributing malware or conducting phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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 https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/e327c118cf98d8c62f77dccd73dbf7d3/suvumapeso.pdf In PDF document text
- https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073860d9a4fa---25595266321.pdfIn PDF document text
- https://ebooksweb.net/files/file/78130134288.pdfIn PDF document text
- https://speakingparrot.com/upload/ckfinder/files/7060803183.pdfIn PDF document text
- http://tscyw.net/userfiles/file/20210701052728_r2hwkr.pdfIn PDF document text
- http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607d526eda099---58535068856.pdfIn PDF document text
- http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606d14be350cb---fafawavagita.pdfIn PDF document text
- https://zoorichi.com/temp/fckeditor/file/pukexopuwuso.pdfIn PDF document text
- https://wsbtitan.com/images/file/82741631929.pdfIn PDF document text
- http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841c35385a3---45888684868.pdfIn PDF document text
- https://ntc-container.com/upload/files/65170300267.pdfIn PDF document text
- https://museos.comarcadelasierradealbarracin.es/ckfinder/userfiles/files/pefenokeku.pdfIn PDF document text
- http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2d8702b53---difixosidi.pdfIn PDF document text
- http://www.urbanwaterways.info/files/rumotozemibofijonufi.pdfIn PDF document text
- https://leonardscopysystems.com/home/leonards/public_html/ckfinder/userfiles/files/44218823091.pdfIn PDF document text
- http://ajarnveerapong.com/UserFiles/file/mesenufupilelepiranokem.pdfIn PDF document text
- https://latework.cz/soubory/87654219147.pdfIn PDF document text
- https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607189ec433a6---68054178866.pdfIn PDF document text
- https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/64ae392800f95f85b353264aeb2e6357/xuvelutisobesato.pdfIn PDF document text
- http://hpworld.hu/data/pic/Image/file/kezafewaju.pdfIn PDF document text
- http://suttonoakfarms.com/clients/880813/File/nezano.pdfIn PDF document text
- http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fufojepumuv.pdfIn PDF document text
- https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/6e21b80139cbfb9f9944d1c994c49e71/13065888408.pdfIn PDF document text
- http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/59001862916.pdfIn PDF document text
- https://www.alugutader.fr/ckfinder/userfiles/files/77950448666.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=universal+tool+grinding+machine+pdfPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b6f6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB6F6	14764 bytes
SHA-256: `95a763bd5d9aa5e770ec2f63a16143b8bf7e46fbb864c90b0fe0665378fe25d5`
`font_01_sfnt_off0000dbff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBFF	11140 bytes
SHA-256: `3e9d788419223752bc8f93c8ba21c089fab58942ff7eb03863fc398e0ba8d684`
`font_02_sfnt_off0000f5a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5A9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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