PDF malware analysis — malicious · c578445b9969a855

MALICIOUS

PDF

92.5 KB Created: 2021-09-23 01:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: d9eada4187397aafcda03a5c42ebbcea SHA-1: 049b0038ab7a1bd9a733c280debd875a29ef818d SHA-256: c578445b9969a855cdf25dc9808aa77331be202a0899881e47e08481a5dc1017

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, many pointing to disposable domains, indicating a link farm or phishing attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to redirect users to a large number of external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9897

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://allytemp.ru/uplcv?utm_term=list+of+roman+gods+and+their+powers PDF link annotation
- https://ksuskalology.com/images/file/40314103306.pdfIn PDF document text
- http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16144d8b0d6480---78784378686.pdfIn PDF document text
- http://soeurs-scjboran.fr/soeurs/upload/files/sumeravu.pdfIn PDF document text
- http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/5854488715.pdfIn PDF document text
- https://sportnazona.bg/f/uploads/files/besudedebajuzixu.pdfIn PDF document text
- http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/93699380550.pdfIn PDF document text
- https://dobski.pl/userfiles/file/45821656806.pdfIn PDF document text
- http://angerdress.store/ckfinder/userfiles/files/gipanugo.pdfIn PDF document text
- https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/aa9dej6u202gb6mnnl73s5uu1m/31957766378.pdfIn PDF document text
- http://hurtowniagrafit.pl/userfiles/file/7778588700.pdfIn PDF document text
- http://unleadedcoffee.cz/soubory/gokujowofemako.pdfIn PDF document text
- https://tanhoaphat.vn/userfiles/file/89836451752.pdfIn PDF document text
- http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/wikajabepimij.pdfIn PDF document text
- http://adria-ex.com/images/blog/file/51262669959.pdfIn PDF document text
- http://bearings-home.com/userfiles/file/92604085177.pdfIn PDF document text
- https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/55919272874.pdfIn PDF document text
- http://www.kevimotor-rock.hu/files/files/54145910540.pdfIn PDF document text
- https://factorysales.com/userfiles/files/57577658595.pdfIn PDF document text
- http://progfin.pl/userfiles/file/kakajumivasanumuminodovo.pdfIn PDF document text
- http://wsospice.org/uploads/userfiles/file/file/49490456798.pdfIn PDF document text
- https://mimpishiodua.com/contents/files/tetazopuwazel.pdfIn PDF document text
- http://toyotarent.tw/FileData/ckfinder/files/20210902_45ABCA2388AAB476.pdfIn PDF document text
- https://momsgardenfoods.com/ckfinder/userfiles/files/65763430973.pdfIn PDF document text
- http://krallarintavugu.com/upload/file/31869447570.pdfIn PDF document text
- http://www.toptehnik.si/images/jugefifitutoraximadovod.pdfIn PDF document text
- https://tpk-m.ru/files/file/duvokerod.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_off000105e0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105E0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011df7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DF7	10944 bytes
SHA-256: `4f41d65b30499890b9e19e9551c2469f060ef428305e86e05fa5fffc351f2247`
`font_02_sfnt_off00013700.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13700	17296 bytes
SHA-256: `013662eea9fbd24fee80bb48a665a239ab97aa01d7458bc513827135eceaa074`

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