PDF malware analysis — malicious · e392f6e02910c015

MALICIOUS

PDF

88.0 KB Created: 2021-07-05 21:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 10f1e22f2bc0abb6ace4ca14e6b38fa9 SHA-1: e9abe4a031e588586235964b0357962075eec8c0 SHA-256: e392f6e02910c0155dce6d664eb7fc9b4432ccc1d823872c01b799adea8ef128

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of a link farm is sufficient evidence of a malicious attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a261f27979e---66548519405.pdf In PDF document text
- http://yasairamenbar.com/uploads/files/88108166642.pdfIn PDF document text
- http://caramelitos.sk/files/xotugejanuduxowomawuguj.pdfIn PDF document text
- http://szakkepzosiklos.hu/upload/file/dizofiwumufatafegebaj.pdfIn PDF document text
- http://maroba-zirndorf.de/file/pepibupugewigijitij.pdfIn PDF document text
- https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16076a88ac14b6---dibamu.pdfIn PDF document text
- https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/d732be8438f3ae7b1e4ed8d9ae76d195/93270105242.pdfIn PDF document text
- http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1608755aee6831---54334836664.pdfIn PDF document text
- http://guitarenko.fr/img/files/62615219467.pdfIn PDF document text
- http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a56a281d936---64418053568.pdfIn PDF document text
- https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/5759056741c44fdc22175f68c18aaee6/jefebixexaba.pdfIn PDF document text
- https://annjulieskarpmo.com/userfiles/file/12360796954.pdfIn PDF document text
- http://bloomx.com/sites/all/sites/bloomx.com/files/divafutenevoju.pdfIn PDF document text
- https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a7deb24232a---segoxujamolopumutax.pdfIn PDF document text
- https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c09dd71c4f9---2566035534.pdfIn PDF document text
- https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/1vq1428da9f5dhr5188cjv9f30/47029878874.pdfIn PDF document text
- http://sbox-technology.com/upload/datoteke/luzinarivuwija.pdfIn PDF document text
- http://vtvxm.vn/userfiles/file/rerigefewexakepiweru.pdfIn PDF document text
- http://playeasypiano.com/resources/fck_images/89506125355.pdfIn PDF document text
- http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1272d5f25---2805544333.pdfIn PDF document text
- https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78ce9cb5c4---nexuvufukogas.pdfIn PDF document text
- https://educationindiajournal.org/ckfinder/userfiles/files/nabenoni.pdfIn PDF document text
- https://airflow-skateboards.com/upload/file/13227129106.pdfIn PDF document text
- https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e2105f7e660---5622967343.pdfIn PDF document text
- https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/032b2b24a7f609afee4a1c6271ba5eb4/32219706810.pdfIn PDF document text
- http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/jq7khm17fifcdl2ab3n2gnkb54/fejasoko.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=homemade+protein+powder+in+tamilPDF 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_off0000ef9d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF9D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000107b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107B4	10460 bytes
SHA-256: `bc44f34acb672dabebdee12fc17a358b0ac59003d05380084921ca9297696d0a`
`font_02_sfnt_off00011f56.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F56	18576 bytes
SHA-256: `b6ad745a1ba3d76c030c7b670803292c7003832d8e6a1a7c03c3889716bd161d`

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