PDF malware analysis — malicious · dc6ce95b50594ed4

MALICIOUS

PDF

86.1 KB Created: 2021-09-01 05:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 84e06d03f089ab62bcddd78b3a97dcce SHA-1: 8a3519a19a974fbbad6e1d34819ab8b1584965dd SHA-256: dc6ce95b50594ed4249d130c90a5e634ab9975496bbc8a34bd15ff4161ccd795

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to malicious content or further stages of an attack. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9984

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://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/52561d3b4c44ad995d6f740e40ad7275/86730291801.pdf In PDF document text
- http://robalton.es/Albums/images/file///bamaxovezap.pdfIn PDF document text
- http://pinturasoltra.com/images/slider/files/64687898595.pdfIn PDF document text
- https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/2bb95921f605c710f5fad20624a0fe55/40968737398.pdfIn PDF document text
- http://deeringbayrealestate.com/userfiles/files/38445650063.pdfIn PDF document text
- https://bbpartner.cz/userfiles/file/tijuragigafu.pdfIn PDF document text
- https://traveletrust.com/basefile/traveletrustcom/files/38658582940.pdfIn PDF document text
- http://kronikarp.pl/ckfinder/userfiles/files/82236714588.pdfIn PDF document text
- http://porpora.eu/imagenes/imagenes_contenidos///mukalivalevemejupasukewu.pdfIn PDF document text
- http://ibookingkr.com/FileData/ckfinder/files/20210804_1E4B485D40AC656F.pdfIn PDF document text
- https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bcf121cdc9---wawowuvajuvifeboxoxipedaf.pdfIn PDF document text
- http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16081251ca16a2---dunamanewuxed.pdfIn PDF document text
- https://adikketiga.com/contents//files/25246480231.pdfIn PDF document text
- https://gbagencement.fr/uploads/file/tozokezolifekawolafe.pdfIn PDF document text
- https://esportenerd.com/app/webroot/ckfinder/userfiles/files/5486934885.pdfIn PDF document text
- https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/6f8261df035e070e05d62390a815305e/5290023329.pdfIn PDF document text
- http://kfnmdg.com/upfolder/e/files/20210807085604.pdfIn PDF document text
- http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160f49eb0985f3---1411002117.pdfIn PDF document text
- http://wib24-admin.de/uploads/file/58576331929.pdfIn PDF document text
- http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16109f94c57043---xusijuwofu.pdfIn PDF document text
- http://permanentnimakeup-brno.cz/userfiles/files/59452526746.pdfIn PDF document text
- https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d64554e0c---batokerevokopilosororola.pdfIn PDF document text
- http://zulaikhatextile.com/userfiles/files/narolalifurakogif.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=football+fitness+drills+for+12+year+oldsPDF 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_off0000ec8d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC8D	10752 bytes
SHA-256: `9d9c66451effc6c785b8ea7e2a55616ec8025209905757d8a5b18c45d9fa29ed`
`font_01_sfnt_off0001057c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1057C	17320 bytes
SHA-256: `7f146874e98034115eac43d092ef33abcd80030a2faa15df7c5ba42fa0b4297c`
`font_02_sfnt_off000131c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x131C0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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