PDF malware analysis — malicious · b25a4791b5daedff

MALICIOUS

PDF

72.1 KB Created: 2021-09-25 19:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: d6f30a15ae8b7cadc52a5c39f88b25cc SHA-1: ee40134232031f0d32344009d99a05a2f9559cf0 SHA-256: b25a4791b5daedff4c54e1b9363a966534d6fc70628fcfca9988956338cd091f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm with numerous URLs, many hosted on compromised CMS upload directories or disposable domains, suggesting an attempt to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, further supporting a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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://baohohoanglong.com/userfiles/file/kejoxifedim.pdf In PDF document text
- https://yumasri.com/assets/ckfinder/userfiles/files/riwiremonemazuligopifemor.pdfIn PDF document text
- http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ee664ba7d0---88265305784.pdfIn PDF document text
- http://ff-engineering.com/userfiles/files/xuzixunivav.pdfIn PDF document text
- https://sanghvicranes.com/staging/media/rogerajevidodemino.pdfIn PDF document text
- http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140ea8386cfd---xokadilopuponowezu.pdfIn PDF document text
- https://eastmanllc.com/ckfinder/userfiles/files/10465995011.pdfIn PDF document text
- http://portalcom-b2b.es/img/user//file/_0872346001631137591.pdfIn PDF document text
- http://le-lemniscus-incandescent.fr/ckeditor/upload/files/44072062584.pdfIn PDF document text
- http://pol2-simf.ru/userfiles/file/40183906904.pdfIn PDF document text
- http://blevy.com/ckfinder/userfiles/files/bajasosetuzabiwax.pdfIn PDF document text
- https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613108d4ea2ad---11249579121.pdfIn PDF document text
- https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c790e3e5f1---vorukewovunoxiguxigitin.pdfIn PDF document text
- https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161470ac5a64e8---88158002303.pdfIn PDF document text
- http://openendrep.com/userfiles/files/316662130.pdfIn PDF document text
- https://ptogel2.com/contents/files/toxupetalujapuwejanem.pdfIn PDF document text
- http://hyunshin.net/userfiles/file/22389911494.pdfIn PDF document text
- http://sva-jeanroze.com/xmedia/file/lexurenopowe.pdfIn PDF document text
- http://camelliafb.com/uploads/files/202109060509265159.pdfIn PDF document text
- http://hublihorse.com/uploads/userfiles/files/dekorox.pdfIn PDF document text
- http://tc-muehlacker.de/data/tcmuehlacker/userfiles/file/69643000854.pdfIn PDF document text
- http://cafegreenwichvillage.com/uploads/files/19183551357.pdfIn PDF document text
- https://firsatoyun.com/calisma2/files/uploads/tipepijo.pdfIn PDF document text
- https://acrgruppe.de/userfiles/file/luvulu.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=cheat+gta+san+andreas+android+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_off0000b52e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB52E	17316 bytes
SHA-256: `7e4020f946831de724822a4b59d47cdc6cc2893f4e00dbd2959b784baa1bc81e`
`font_01_sfnt_off0000e1c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE1C6	10748 bytes
SHA-256: `512b21482f6fcf65db1398f0209c5b7445d563924193886859b9d12039812397`
`font_02_sfnt_off0000fa44.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA44	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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