PDF malware analysis — malicious · 3746f39e2a3b1893

MALICIOUS

PDF

108.1 KB Created: 2021-06-26 22:35:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: f0a4818385a5a36d38ef30c281a8ce74 SHA-1: f18a21d59e0eaf89791375695d5a591a6919f961 SHA-256: 3746f39e2a3b1893bc9585234f3f52e96c3bc34b9c54de9fdbcfb6e113c11972

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, suggesting an attempt to redirect users to phishing or malware-hosting pages. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs further support the link farm and potential phishing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9698

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/aa74b172bb67ebdc4016187baa56974a/82343547156.pdf In PDF document text
- http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609c44e6744cf---31646187682.pdfIn PDF document text
- http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160705f32c6ffe---kenujebilonivijasapu.pdfIn PDF document text
- https://accuratesearch.com/userfiles/file/5608949487.pdfIn PDF document text
- http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d2cae9b9439---xeriparowijizaminudiz.pdfIn PDF document text
- https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b4c8089e6---xuvali.pdfIn PDF document text
- http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c35065a996d---40218623295.pdfIn PDF document text
- http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2ef8dad83---rawutuf.pdfIn PDF document text
- https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094120c6478e---zitorufakufisijibodod.pdfIn PDF document text
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a28655f765---jilise.pdfIn PDF document text
- http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c49978f0089---32230424012.pdfIn PDF document text
- https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/194a81cd0a0a8b644da83dd9bc4efe7a/dulokoditozerepiwu.pdfIn PDF document text
- https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/758188a5482dedf8277d2dc1eb65be26/xesewefiw.pdfIn PDF document text
- http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160898b3878fc9---19641432504.pdfIn PDF document text
- http://wskinbody.com/data/boardData/files/nazodatakopedinonofoxezed.pdfIn PDF document text
- http://beveragesgs.com/userfiles/file/31134636225.pdfIn PDF document text
- http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/bf278deece521525d1ecf15b6c73b117/pudesumedepotavaf.pdfIn PDF document text
- https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/12084482404.pdfIn PDF document text
- http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a435e8d9159---2415791745.pdfIn PDF document text
- https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/4d6a997b3d2901ca6dfa0c167563a256/rulereriregixez.pdfIn PDF document text
- http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca9192eeeb---kivanijonopowenav.pdfIn PDF document text
- http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d428319f8a---benir.pdfIn PDF document text
- https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160967df47b04f---94393372867.pdfIn PDF document text
- https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/ef90d35ca70fffa264d2f231f47460f6/vekufekasu.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=meaning+of+a+moronPDF 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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_005_off000166a6.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x166A6	20256 bytes
SHA-256: `abfa24bf58c37b0b1562baa1463e22b192fa04ef307f8c072bbd6bcaea0ed0eb`
`font_00_sfnt_off0000f385.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF385	5756 bytes
SHA-256: `1f2a0bd7acccb58dc8d13b30c95b9d9c5d9fef6fbd8a259242e3ccb4e69b583b`
`font_01_sfnt_off000107d9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107D9	29852 bytes
SHA-256: `b9daf62609f1b72807cfec02a74425a45c8779fd97723326df9be10ceb2bc86b`
`font_02_sfnt_off00014fc0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14FC0	10240 bytes
SHA-256: `45a58285c230d890bde5fa9bd789ade2c46d121acbaf0981359176412a0734f5`
`font_04_sfnt_off00018a18.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18A18	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.