PDF malware analysis — malicious · 1d4f3169d2cac3b9

MALICIOUS

PDF

85.0 KB Created: 2021-06-25 23:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25

MD5: b54173ee2929c764c702f8af4a6650a9 SHA-1: 2ef0847110e0996a2d9b8bd7443c60ab954356b4 SHA-256: 1d4f3169d2cac3b9b3ba0eddcf72c4930e62cea45f7c606ec5033e622d6f42db

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.8742

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://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/a11626702f92ea882331c9d79d390280/4196015901.pdf In PDF document text
- http://theheavent.com/userfiles/files/16186811987.pdfIn PDF document text
- https://peilimineko.com/userfiles/file/6051959840.pdfIn PDF document text
- https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/4k17n8mi7kr2p5jsfgklpeu8p1/4755302859.pdfIn PDF document text
- https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8532a4c81d---funopoxipeturofisefe.pdfIn PDF document text
- http://15fratrowreunion.com/clients/2/2b/2b18ccadde375fd95e9ac2d5db5aaa67/File/birudonid.pdfIn PDF document text
- http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/30168974722.pdfIn PDF document text
- http://bjhtdszdh.com/v15/Upload/file/2021524141167687.pdfIn PDF document text
- https://ebooksweb.net/files/file/53849341781.pdfIn PDF document text
- http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715481c7ab9---69324023221.pdfIn PDF document text
- http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1f748feeb---18754239341.pdfIn PDF document text
- http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a798c104d---90162522767.pdfIn PDF document text
- https://balustrady-metalik.pl/files/xevev.pdfIn PDF document text
- http://hk-sai.com/ckfinder/userfiles/files/48968306924.pdfIn PDF document text
- http://yljx.cn/images/upload/File/zezubalatezab.pdfIn PDF document text
- http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16091324fc6275---90195533171.pdfIn PDF document text
- http://sungsam.net/userData/board/file/11298083242.pdfIn PDF document text
- http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b886313a6---sefoximunixowiber.pdfIn PDF document text
- http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/36761d430a7c5f2bf7578cd58223cd99/xinenajitugifupiwawirero.pdfIn PDF document text
- http://eshop-kocicinadeje.cz/files/file/selimitulamudan.pdfIn PDF document text
- https://agatanorek.com/files/file/wususubafoxitirizuro.pdfIn PDF document text
- http://domainecomps.com/documents/files/fuwimazudixuwodixivuvowaj.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=revoked+meaning+in+tamilPDF 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_off0000e606.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE606	16120 bytes
SHA-256: `27024b122eba49fd3fc1c2d8f22afa726925bc898800408e683f1b37f97f45a1`
`font_01_sfnt_off0000fb67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB67	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011379.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11379	17296 bytes
SHA-256: `fc90deadb134c7ca67357f046e7728df3571dceaecd2f632d97826759d078a89`
`font_03_sfnt_off000140a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x140A2	10524 bytes
SHA-256: `a9ca4764828d305b1ffae6e523917619d56281977d2833b7967dc3e4df7c6051`

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