PDF malware analysis — malicious · 99f352703a5834d9

MALICIOUS

PDF

88.1 KB Created: 2021-09-07 11:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: acd86f8302a0d143903901fc4b8e1f07 SHA-1: 89ffa3b637041b9fe153d11f4b48dd8817e6ae56 SHA-256: 99f352703a5834d97a973f0632ae74073c27a4c1272ca9a2c40004abd383c8ec

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is detected as a malicious PDF by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting. The embedded URLs suggest an attempt to redirect the user to external sites, likely for phishing or to download further malicious content. The document body contains obfuscated text and a URL, indicating a potential lure.

Machine Learning

Nyx PDF Classifier suspicious score 0.3803

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://allytemp.ru/uplcv?utm_term=vatican+2+hymnal+pdf PDF link annotation
- http://growlink.biz/userfiles/file/leporisiz.pdfIn PDF document text
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d26bcbff2---tinofozojizax.pdfIn PDF document text
- http://poledance-chrudim.cz/files/file/mobodalu.pdfIn PDF document text
- http://hondasushi.com/uploads/files/51792468088.pdfIn PDF document text
- http://instant-image.net/UserFiles/Site/File/miwupizivivijubogen.pdfIn PDF document text
- https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160f3f7c0bac81---12390972657.pdfIn PDF document text
- http://itineraire-consulting.com/ckfinder/userfiles/files/72098071636.pdfIn PDF document text
- https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085410dc0dce---76105486919.pdfIn PDF document text
- http://guanzhuli.com/userfiles/file/60389137429.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16096550751e63---20992443637.pdfIn PDF document text
- http://portalinmobiliario24.com/uploades/fckeditorfile/bewagezotinoxutebojirijup.pdfIn PDF document text
- http://nbpcpentecostalchurch.com/clients/65183/File/84892830183.pdfIn PDF document text
- http://weorderfood.com/uploads/files/wokelixexosu.pdfIn PDF document text
- http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876fb8cdcd3---likavolodetepodeb.pdfIn PDF document text
- http://ahkjt.com/upfile/file/femufawojuniroru.pdfIn PDF document text
- http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a27a73efd12---vuledigupewapelosewup.pdfIn PDF document text
- https://businesslife.com/content/file/papujum.pdfIn PDF document text
- https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a9ab09f9f---mulivewinederasifimibala.pdfIn PDF document text
- http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/4d609930bc6123f89abac5db16937186/95014624796.pdfIn PDF document text
- https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160878b4402fec---14153319328.pdfIn 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_off00010081.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10081	10568 bytes
SHA-256: `825c89708a2c972a7a262b3ff679843d674575b2d8ebfdd05911279143205e5c`
`font_01_sfnt_off00011879.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11879	18728 bytes
SHA-256: `16c64aa98393f99986bfa0193fb04a708f16bf2078584a9f95ab971e3891caff`
`font_02_sfnt_off000148a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x148A4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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