PDF malware analysis — malicious · 3ecb1f7450770fe2

MALICIOUS

PDF

85.0 KB Created: 2021-09-15 03:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 73f720f1fb946bee5c4ad7f37d32356b SHA-1: 8f9058c33060ed950f3474a175195400453eb580 SHA-256: 3ecb1f7450770fe2e385049a306fc600691e5afaad70dbc8af584e05cb47dfff

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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 https://synerhu.ru/uplcv?utm_term=offline+anime+games+android PDF link annotation
- http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/499271a7a63532e79e032650f3a70703/konadilaf.pdfIn PDF document text
- http://baigeleather.com/userfiles/file/40222891070.pdfIn PDF document text
- https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/wojodiwupixowisap.pdfIn PDF document text
- https://mamalight.net/business_school/uploads/file/jikupamavuz.pdfIn PDF document text
- http://norilskgu.ru/userfiles/file/9499953659.pdfIn PDF document text
- http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec353325d5---gigavopemisivegopanojuze.pdfIn PDF document text
- https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/3c6fe24355237c9364932c06fe39a91e/47250981492.pdfIn PDF document text
- https://cevhertemizlik.com/userfiles/files/nonuxuvudenapasirav.pdfIn PDF document text
- http://abimobiliare.pl/pliki/File/1181757558.pdfIn PDF document text
- http://nail-free.com/ckfinder/userfiles/files/bisikurolopafuwuvevo.pdfIn PDF document text
- http://juncheng.tw/upload/files/3731129082.pdfIn PDF document text
- https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613404dd3b9ea---xutarinokexo.pdfIn PDF document text
- https://zaragozadenoche.es/upload/files/nogesotesavozavovaboxak.pdfIn PDF document text
- https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613991c8060cc---pumegajokexexoposaramux.pdfIn PDF document text
- http://polipack.ru/content/file/64035725146.pdfIn PDF document text
- https://artistaone.co/userfiles/files/60869035886.pdfIn PDF document text
- http://timnhanhonline.vn/upload/files/bofor.pdfIn PDF document text
- http://1mosref.ru/ckfinder/userfiles/files/56512252976.pdfIn PDF document text
- http://nfc-lampang.com/user_img/files/63367421948.pdfIn PDF document text
- https://channeloflove.com/ckfinder/userfiles/files/70188391152.pdfIn PDF document text
- https://www.puskinas.lt/ckfinder/userfiles/files/8290808537.pdfIn PDF document text
- https://eownauto.com/uploadpic/files/87177501595.pdfIn PDF document text
- http://residencelesaline.it/userfiles/files/padirovuguzuraxanejadar.pdfIn PDF document text
- https://hunghiephuylog.com/upload/files/pijezaxax.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_off0000eb4c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB4C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001035e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1035E	16632 bytes
SHA-256: `7e8932c6537b703e430446a18998e10314f055e79245094eec58802610f6178c`
`font_02_sfnt_off00012eaf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12EAF	10624 bytes
SHA-256: `00423e3f8fb20fb987c3b59bca978603be03ac6bc97661250769186ea17b0374`

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