PDF malware analysis — malicious · f1fa79f57806120a

MALICIOUS

PDF

70.3 KB Created: 2021-09-17 13:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 11fe7a7389151f641646aed55da90878 SHA-1: 74f327a70b22c8c9d43fde1ee683e9304a60789c SHA-256: f1fa79f57806120ac4b21d4c6e94420f52b9b8cd5c7d3aa6f58c547451224eb3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of external URI heuristics and compromised CMS upload links further supports the attack pattern of redirecting users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9885

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 http://teifsepahan.com/files/file/musinopadipugijupa.pdf In PDF document text
- https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/v7ei213ulu0fh7o2hhusee0aj6/19651304966.pdfIn PDF document text
- http://arabic.cz/ckfinder/userfiles/files/98372561406.pdfIn PDF document text
- https://www.afoa.org.ar/backend/ckfinder/userfiles/files/mawujabatejibirevefumo.pdfIn PDF document text
- http://fujieshubao.com/zk/UploadFile/file/2021091605083373499.pdfIn PDF document text
- http://cosmoscm.com/contents/files/37723459886.pdfIn PDF document text
- https://vinocastillo.hu/editor_up/53122875346.pdfIn PDF document text
- http://www.novosib-sport.ru/ckfinder/userfiles/files/nugibivenewovasege.pdfIn PDF document text
- http://popnmusic.fr/userfiles/file/29512629784.pdfIn PDF document text
- https://actorconseil.com/files/file/81250748220.pdfIn PDF document text
- http://shipsupply.ru/userfiles/files/76314923784.pdfIn PDF document text
- https://audit-advisers.com/userfiles/file/57555433950.pdfIn PDF document text
- https://aldwalia.com/userfiles/files/25445620634.pdfIn PDF document text
- https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/fd1bf71c2168931d03d6df9145821402/92474728104.pdfIn PDF document text
- http://skontrolsengineering.com/file_media/file_image/file/97731923474.pdfIn PDF document text
- http://rc-mst.com/mst/_upload/files/90659703971.pdfIn PDF document text
- http://sxsasa.org/images_fck/file/1631687681.pdfIn PDF document text
- http://airzo.net/userData/board/file/fojewikufixativiluto.pdfIn PDF document text
- http://irinabailey.com/upload/files/ximesapuwupijeromixowoge.pdfIn PDF document text
- http://fmi.lu/userfiles/files/9601159181.pdfIn PDF document text
- https://sweetburden.com/upload/users/files/37461474177.pdfIn PDF document text
- http://mrcookie.tw/upload/editor/file/072054032709.pdfIn PDF document text
- http://xn--80aaaaadfwa5aftjhxrkcrg8iwc.xn--p1ai/pict/file/nuderitovuragijuzifur.pdfIn PDF document text
- https://odontologosmalca.com/images/userfiles/file/mowalawewe.pdfIn PDF document text
- https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143e99613da0---7018848403.pdfIn PDF document text
- https://jiu-hang.com/upfiles/editor/files/tujoniwabijisixelutig.pdfIn PDF document text
- https://nakipoglugroup.com/upload/ckfinder/files/21074978864.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=idle+digging+tycoon+apkPDF 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_off0000b62b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB62B	14844 bytes
SHA-256: `d9d592b04d6ae888d54baeadd3c91fa3043402cd2e8ed55e60a629e7da2a775f`
`font_01_sfnt_off0000db73.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB73	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f38a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF38A	10580 bytes
SHA-256: `083d7ff4eaede0ca18d78c4a2a5a0a856854671dd684b7c02b298b26507cfd00`

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