PDF malware analysis — malicious · 97ca0948994bd155

MALICIOUS

PDF

83.6 KB Created: 2021-09-24 11:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 05e63909608ccea6faed380622c39dbc SHA-1: c6bf1d91355445490252857212482730a08ae5cc SHA-256: 97ca0948994bd155ede5371ddb6f5a1b4fc4392f8d13b50bf2d6e4a82cba4819

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicates a deliberate attempt to obscure the true destination or leverage compromised infrastructure. No scripts were extracted, but the overall structure points to a malicious document.

Machine Learning

Nyx PDF Classifier malicious score 0.9780

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://garglob.ru/uplcv?utm_term=android+telefonum+cok+yavasladi PDF link annotation
- https://ckeditor.pamlskovnik.cz/ckfinder/userfiles/files/79006751666.pdfIn PDF document text
- https://decoveinvestment.com/userfiles/file/niwovadonolo.pdfIn PDF document text
- http://meyanko.com/userfiles/file///taribitamenewos.pdfIn PDF document text
- http://belloverde.net/emailer/file/11024881974.pdfIn PDF document text
- http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16141bae88716f---5141278162.pdfIn PDF document text
- https://j26clean.com/upload/files/nipuv.pdfIn PDF document text
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613994dfb936c---3549481860.pdfIn PDF document text
- http://worldtile.net/jangheung/userfiles/file/rerafelanubin.pdfIn PDF document text
- http://radio6deenero.com/uploaded/files/joniloguxalokedo.pdfIn PDF document text
- http://hiro-seiko.com/upload/files/50353841329.pdfIn PDF document text
- http://fpempresa.cen.es/userfiles/files/pewazoza.pdfIn PDF document text
- https://acrgroup.nl/userfiles/file/57149268869.pdfIn PDF document text
- http://epilia.com/upload/FCKEditorfile/77626309968.pdfIn PDF document text
- http://baraanduliaptti.org/userfiles/file/12857996012.pdfIn PDF document text
- http://ministerium.pt/files/zukukosasuribeb.pdfIn PDF document text
- http://gldbirdgel.com/user_img/files/23212633653.pdfIn PDF document text
- http://hanasushi6.com/uploads/files/zibokexubebadazuxoweze.pdfIn PDF document text
- http://xn--m1age8bh.xn--p1ai/files/file/najufulotanup.pdfIn PDF document text
- https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/j4lsu5r02kpv7112a2udtt7s56/birarigatofuwafor.pdfIn PDF document text
- http://peak-experience-japan.com/images/blog/file/70789472312.pdfIn PDF document text
- http://tuanayapim.com/rsm/files/nizetalezuworuvoveje.pdfIn PDF document text
- http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/7uknvunnsv3aq1pnj36qbt0q62/3413921075.pdfIn PDF document text
- https://namhunglogistic.vn/site/files/44199881956.pdfIn PDF document text
- https://nocnepal.org.np/ckfinder/userfiles/files/fosemoze.pdfIn PDF document text
- https://dolnoslaskialarmsmogowy.pl/imgturysta/files/61222896521.pdfIn PDF document text
- http://rubivina.com/Images_upload/files/lezofisejugunoxeni.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d8ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8AD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f0bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0BF	18124 bytes
SHA-256: `666cd1e619fbb925db4a1b1f8ba3207030e34456325215169a542ba6769af05b`
`font_02_sfnt_off00011d02.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D02	10992 bytes
SHA-256: `26e512c720738049e32db66b4245a5e5460017ebf4ffdef51276cf40af2b5cd0`
`font_03_sfnt_off00013692.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13692	1660 bytes
SHA-256: `dab79b2fd5a2dc11d6eb37fc3a216db411bb5cae5587d5ad9145acf34746c19f`

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