PDF malware analysis — malicious · 1fbc15948233780e

MALICIOUS

PDF

79.8 KB Created: 2021-09-18 06:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 9f05e48953da1fca793d7fdb13c8ab9b SHA-1: 9e4610fa7b028941098035150089c08e65898fb8 SHA-256: 1fbc15948233780e51c5ed9abbd219c1740aaab9f36643130f58a7ef00ab0867

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to 'infrive.ru' which is flagged as a link farm. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to the link farm, which in turn hosts numerous other PDFs, suggesting a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://infrive.ru/uplcv?utm_term=free+hd+wallpaper+android PDF link annotation
- http://nacyc.jp/Upload/file/71629127416.pdfIn PDF document text
- https://cedria.es/DOCUMENTS/FotosFCKEditor/file/zebiduvojogarugajo.pdfIn PDF document text
- http://youngshiny.com/userfiles/file/1630777431.pdfIn PDF document text
- https://suativisamsungtaihanoi.net/upload/files/17639745047.pdfIn PDF document text
- http://sosnovgeo.ru/userfiles/file/9880429809.pdfIn PDF document text
- http://spartaksedlec.cz/spartaksedlec/userfiles/file/80330212201.pdfIn PDF document text
- http://uts.edu.co/portal/app/ckfinder/userfiles/files/25922325433.pdfIn PDF document text
- http://thcscatquea.hoaiduc.edu.vn/ckfinder/userfiles/files/35762335066.pdfIn PDF document text
- http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613113f24d58f---nupojapupubalebozutozezo.pdfIn PDF document text
- http://pinturasoltra.com/images/slider/files/11044851952.pdfIn PDF document text
- https://u-spot.biz/js/ckfinder/userfiles/files/saxisopejakarijanurirasa.pdfIn PDF document text
- http://hoteldarim.ir/basefile/hoteldarimir/files/12133673848.pdfIn PDF document text
- http://jsdarvin.com/files/jedukef.pdfIn PDF document text
- http://tuttotop.com/userfiles/files/gupenofavebedi.pdfIn PDF document text
- http://armanetti.com/images/12282746653.pdfIn PDF document text
- http://radecznica.pl/userfiles/file/80199801888.pdfIn PDF document text
- http://ncteonline.com/userfiles/file/joraripema.pdfIn PDF document text
- https://technoarc.net/userfiles/file/74234115882.pdfIn PDF document text
- https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139370877035---94855053087.pdfIn PDF document text
- http://virus-safe-zone.com/ckupload/files/vixiwejupegarade.pdfIn PDF document text
- http://jocoseatee.com/userfiles/files/dobuvaj.pdfIn PDF document text
- http://k2plusinterior.com/userfiles/96434735720.pdfIn PDF document text
- https://petpetmates.com/files/editor/file/96924256774.pdfIn PDF document text
- http://teedinmaesai.com/user_img/file/vobimojove.pdfIn PDF document text
- https://divanich96.ru/admin/ckfinder/userfiles/files/23548529011.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_off0000d657.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD657	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ee6e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE6E	10288 bytes
SHA-256: `f3aa17e6e841c24caf79f975d6c0e5e13b60d5751b5826351e40ceec647f8fdc`
`font_02_sfnt_off00010570.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10570	17052 bytes
SHA-256: `ffd6ce6d87d771778068e6610ef55dbc2e3fa2fdccb2faffa1e63209e4e01249`

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