PDF malware analysis — malicious · 8511405485dd1752

MALICIOUS

PDF

66.5 KB Created: 2021-09-12 04:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: b2373f331c18f164fe49fcbdd49b5d93 SHA-1: 496531fb39adeb5b63101a309be8e0f9b6040de4 SHA-256: 8511405485dd1752a22cdad1cdb0c2b702f87236a63983e38027f7999bfdf07e

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan and a machine learning classifier. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The PDF structure and embedded content suggest an attempt to redirect users to malicious websites, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.6664

Heuristics 4

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
External URI info PDF_URI

PDF contains an external URL action
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://jjpremiers.com/files/gulibatikizu.pdf In PDF document text
- https://yesilkoyluleriz.biz/resimler/files/gekejefolakikebovok.pdfIn PDF document text
- http://jvcc.cn/ckfinder/userfiles/files/210910100008574380s1yuc.pdfIn PDF document text
- http://gu-bo.cn/uploads/files/tiwovadeja.pdfIn PDF document text
- http://imssp.by/data/images/fxeditor/file/nafesevawinegojudewaxonup.pdfIn PDF document text
- https://ourcampuswindow.com/ckfinder/userfiles/files/59123294308.pdfIn PDF document text
- https://mosaicopeoplecorporation.com/ckfinder/userfiles/files/nabesufatutuluniv.pdfIn PDF document text
- http://poptheme.cn/uploadfile/files/20210911_095856.pdfIn PDF document text
- http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/24071172561.pdfIn PDF document text
- https://confidence-ist.com/ckfinder/userfiles/files/jebirojosobibubexaberej.pdfIn PDF document text
- http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16130fadb816e1---40956205896.pdfIn PDF document text
- http://dragoniresorts.com/userfiles/fuzadabetobasuvujifu.pdfIn PDF document text
- https://hurghadalife.net/userfiles/files/jarokejiveredunikir.pdfIn PDF document text
- https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/dc8987a3e6e73546a57b16b4ab571a6e/17236582806.pdfIn PDF document text
- http://hongdanhaudio.com/luutru/files/34541170173.pdfIn PDF document text
- http://sieuthibongda.net/ckfinder/userfiles/files/seliwosorilowumojoge.pdfIn PDF document text
- http://prepearl.com/uploadsfile/31302342419.pdfIn PDF document text
- https://successalpha.team/upload/files/57964451463.pdfIn PDF document text
- https://interference.ajoda.eu/userfiles/files/ninurez.pdfIn PDF document text
- http://iraneto.com/basefile/iranetocom/files/pubegevoxub.pdfIn PDF document text
- https://sweetburden.com/upload/users/files/puguza.pdfIn PDF document text
- http://okwmd.com/upload/fckeditor/file/86375501622.pdfIn PDF document text
- http://panteres.com/files/files/gedakiwifepuwedaledukixe.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=pokemon+heartgold+soulsilver+downloadPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000db1a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB1A	11040 bytes
SHA-256: `526793d774984cbeb3e96456c3f3d91327af9239db8d49c719f1758999dbd0fe`
`font_01_sfnt_off0000f475.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF475	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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