PDF malware analysis — malicious · 5499fbd7ca7c8e5e

MALICIOUS

PDF

84.6 KB Created: 2021-08-30 11:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 8a75b914f73b74d4e5958f2d939cad5f SHA-1: ceeb6ca3844cc8b3bc18ad52e8b140938f4fc832 SHA-256: 5499fbd7ca7c8e5e3afac4bdffe7acdff6653b29b172d453e5fa8565e41f2235

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external domains, suggesting it functions as a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags it as a link farm on disposable hosting, reinforcing the phishing/malware distribution hypothesis.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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
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://irlanc.ru/uplcv?utm_term=chicken+bacon+ranch+mac+and+cheese PDF link annotation
- http://firanywiktoria.pl/uploads/editor/file/golujovaroxevafosiliko.pdfIn PDF document text
- http://licausi.it/userfiles/files/57943530562.pdfIn PDF document text
- https://anaksemut.com/contents//files/80092842322.pdfIn PDF document text
- https://vibanghanoi.com/uploads/files/29267192528.pdfIn PDF document text
- https://estoniapools.com/contents//files/vimemonuw.pdfIn PDF document text
- https://binarbaidtrading.com/public_html/userfiles/file/69001953664.pdfIn PDF document text
- http://www.deewanalarab.com/up_imgs/29927441792.pdfIn PDF document text
- http://mebel-moscow.com/content/xuploadimages/file/81839118040.pdfIn PDF document text
- http://mpu-beratung-brendle.de/userfiles/file/naxujemobolokoliwilugoka.pdfIn PDF document text
- https://auto-rujo.com/images-editor/file/sajizezamebixijobipuxi.pdfIn PDF document text
- http://brilspa.ro/userfiles/file///vejivupi.pdfIn PDF document text
- http://orchid-daikanyama.com/userfiles/file/93740448477.pdfIn PDF document text
- http://sitarofindiamd.com/userfiles/file/99655936254.pdfIn PDF document text
- https://b2cexpressdemo.com/userfiles/file/88954123552.pdfIn PDF document text
- http://ituor.ir/basefile/chartermeinfo/files/faruguwudedoruxiso.pdfIn PDF document text
- http://thunderstar.cn/userfiles/file/20210508171455791181488.pdfIn PDF document text
- http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ab61b35826---fawimusamepukatupikujazu.pdfIn PDF document text
- https://maxlinder.com/admin/assets/ckfinder/userfiles/files/59330920066.pdfIn PDF document text
- https://usssecuritate.ro/userfiles/file/busenokipamejopopan.pdfIn PDF document text
- https://rireenfrance.com/images/upload/files/5309044961.pdfIn PDF document text
- http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd9cf878a6---2150185160.pdfIn PDF document text
- http://wangyiphk.com/userfiles/28870526054.pdfIn PDF document text
- http://www.dkmodels.net/ckfinder/userfiles/files/kerefogezevifitologiwo.pdfIn PDF document text
- https://arbormaster.net/uploads/files/pibedo.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_off0000e412.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE412	17920 bytes
SHA-256: `abac7f1c801f5e3058b66a55c695efd4ae113a3c031b3d313b0eca8995588734`
`font_01_sfnt_off00011225.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11225	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012a3c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A3C	10756 bytes
SHA-256: `b912797dac29c2afbf5d2512036bcd8d5c0ce9a253dd0eab4941cd900b0944b3`

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