PDF malware analysis — malicious · d552f6457be9e103

MALICIOUS

PDF

88.4 KB Created: 2021-09-06 02:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 43a999ff72a6210d6b50f8d468b3f112 SHA-1: 96b138b95c7a33552e4ef1136176e31545558e40 SHA-256: d552f6457be9e1032048d0a3b50696fb6ae80ff17d771ce3061c09f572e23c8f

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a large number of external URIs pointing to compromised CMS uploads and disposable hosting. The primary purpose appears to be acting as a link farm, redirecting users to other malicious PDF files hosted on various domains. The embedded JavaScript likely facilitates the redirection or exploits a vulnerability, contributing to a phishing or malware distribution attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9940

Heuristics 7

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.
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://wastran.ru/uplcv?utm_term=lakshmi+devi+ashtothram+in+telugu+pdf PDF link annotation
- https://mamotato.ro/userfiles/file/40360043844.pdfIn PDF document text
- http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5bf2d6add---61893082999.pdfIn PDF document text
- http://studiogallerani.it/userfiles/files/76219955765.pdfIn PDF document text
- https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/tiegnbjssijpm7f2ddtisqnben/gazuvusufugip.pdfIn PDF document text
- http://gloexdr.com/wp-content/plugins/super-forms/uploads/php/files/01d97e86722fea80a97e1efa60fc6892/45755340060.pdfIn PDF document text
- https://eternalbliss.net/file/40762898095.pdfIn PDF document text
- https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/9ff47255a8b50db472b9f8a4d97e2266/lowejav.pdfIn PDF document text
- http://villahetzwartepaard.nl/survey/userfiles/files/22512404040.pdfIn PDF document text
- https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/276f4b76ff223aab4fc9742b17c05946/94485592463.pdfIn PDF document text
- http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1607e6c0e82d3f---91086827361.pdfIn PDF document text
- http://cuacuonanbinh.com/userfiles/file/73946193827.pdfIn PDF document text
- https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609e831924db1---zorinuwapifoxanupon.pdfIn PDF document text
- https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772fd2a1a35---sewen.pdfIn PDF document text
- http://blesk-stroy.ru/userfiles/files/tabixuvagojuvejodapedo.pdfIn PDF document text
- https://universal4shipping.net/userfiles/file/nizamopad.pdfIn PDF document text
- https://keiba-like.biz/js/ckfinder/userfiles/files/94668013580.pdfIn PDF document text
- https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8bd38b6636509c55a8bcfa4a319420f7/90275535473.pdfIn PDF document text
- https://starbox.fr/img/files/18546949220.pdfIn PDF document text
- http://teormech.ru/teormech/usrimg/file/nodajo.pdfIn PDF document text
- https://gyn-koe70.de/obrazky/file/nevekixabuwosakoziwemo.pdfIn PDF document text
- http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e295927dd---sijurevujajosez.pdfIn PDF document text
- https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf5ca1c388---xenenuv.pdfIn PDF document text
- http://floridare.ru/app/webroot/img/uploads/file/201405_96176818126.pdfIn PDF document text
- http://agnieszkapawlik.com/userfiles/file/sekoxatoredisotagedis.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_off0000d5ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD5BA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000edcc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDCC	20640 bytes
SHA-256: `a80c26d6736d87fdf5bbfa87e3434fa59ebf21b40259917f9bfb2aac5fce85f6`
`font_02_sfnt_off00012366.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12366	11160 bytes
SHA-256: `f08628c44c0f57c6ffc0ed247c7a27bc641c2366b9a228ebf1e8a7b88ddb6ab4`
`font_03_sfnt_off00013d13.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13D13	16240 bytes
SHA-256: `b766e3ffc16e7301125444cebe6101e6ae3c8676e0c375447ba052863369694f`

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