PDF malware analysis — malicious · fe0196044662b5be

MALICIOUS

PDF

78.5 KB Created: 2021-09-02 03:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 3d289d0c518434ff5ca60953e5593116 SHA-1: ce4450012413212d93f75b55c2165c645fe354f6 SHA-256: fe0196044662b5be8b3ead3075cd7d94f358ed95f981e94fce0c9d8701f32edc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the nature of the heuristics strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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://chcial.ru/uplcv?utm_term=heaven+and+hell+meaning PDF link annotation
- https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba5078e752---tajawijenutivuxenit.pdfIn PDF document text
- http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5bc7afcd5---22168579580.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/t9fe2r82o8adg9344nsmpq18o7/jugerojidavidedoditagoga.pdfIn PDF document text
- http://lukoilmarine.com/ckfinder/userfiles/files/zetigoramisobuwekogure.pdfIn PDF document text
- https://gerastar.com/userfiles/file/takize.pdfIn PDF document text
- http://resetimpianti.it/reset/public/file/fekiveninomojevowagajire.pdfIn PDF document text
- http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3280beae0b---jijitanosifaro.pdfIn PDF document text
- http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/akvg85cmu3vl0kbfvka26mus8r/50252563394.pdfIn PDF document text
- http://jinwoosmc.com/userfiles/file/88170746338.pdfIn PDF document text
- http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcbde26792---vabadepivonotofubo.pdfIn PDF document text
- https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f52e2def22---zorixozarozebarapaxuze.pdfIn PDF document text
- http://3dprofi.net/images/uploads/file/paxoralo.pdfIn PDF document text
- http://devison-matras.com/upload/file/34573221324.pdfIn PDF document text
- https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/af518848218002e0ba1ae9548504dbc7/80231226053.pdfIn PDF document text
- http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/semimubabaroxen.pdfIn PDF document text
- http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160986522cc4aa---11713723470.pdfIn PDF document text
- https://sealordhotels.com/ckfinder/userfiles/files/32871558581.pdfIn PDF document text
- https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/6b5cacf04ba3623879c0af2776568bc3/58599562407.pdfIn PDF document text
- https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/bb3420f2eef2b933f88c19a030fd125c/17167543349.pdfIn PDF document text
- http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/34cc2ebcc2d84cefcd9253ef7024faa0/pibimo.pdfIn PDF document text
- https://marbeyoyun.com/calisma2/files/uploads/970779695.pdfIn PDF document text
- http://harekatmemuru.com/images/Media/files/61314036857.pdfIn PDF document text
- https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/31d9e6cc5b24a7d6146ebf6ed999b475/88844348975.pdfIn PDF document text
- https://sibconsulting.com/contents//files/68585699228.pdfIn PDF document text
- http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05ce9257ea---25340353071.pdfIn PDF document text
- http://www.dfdtrading.sk/ckfinder/userfiles/files/83674259110.pdfIn PDF document text
- 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_off0000d020.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD020	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e837.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE837	10264 bytes
SHA-256: `53760b3cacd25b99228cb5b4fcf337607652ad5b8a2e076bebbd53d4efe425d9`
`font_02_sfnt_off0000feb2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEB2	17672 bytes
SHA-256: `7bab47bcb6e6820b14f7141a543f16e162345dbc0d55d64cee2153831d51f030`

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