PDF malware analysis — malicious · 82419fccf94c6b5d

MALICIOUS

PDF

76.5 KB Created: 2021-09-24 08:02:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: 7228811e2fa541567c1672c93234395d SHA-1: 61538b3426e5af27f707714607f009fcfac3750b SHA-256: 82419fccf94c6b5d26e8fe8a77cf6308586fe1134181d884ccc235673465dda4

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript points to T1059.007, and the nature of the file suggests it was delivered as an attachment, aligning with T1566.001.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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
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://huntic.ru/uplcv?utm_term=grow+castle+mod+ios PDF link annotation
- https://samsungdvm.net/upload/ckfinder/files/6016053898.pdfIn PDF document text
- https://travelworld.ro/userfiles/file/zofofedurixubusovak.pdfIn PDF document text
- http://rfaaa.com/UploadFile/file/20210923164833527.pdfIn PDF document text
- https://ever-progress.com/upload/files/josifoj.pdfIn PDF document text
- https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/26222652190.pdfIn PDF document text
- http://salamino.pl/userfiles/file/23325209268.pdfIn PDF document text
- http://secretlove.ch/ckfinder/userfiles/files/siwowabesifubejarugogok.pdfIn PDF document text
- https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/k777mp1307sa5qlsq21v8ek90s/junejefe.pdfIn PDF document text
- http://akbarestate.com/survey/userfiles/files/nazevurina.pdfIn PDF document text
- http://nakamurasangyou.jp/app/webroot/uploads/files/juvemekofed.pdfIn PDF document text
- http://dpnovelty.com/upload/files/duxelitoriwuselixitoga.pdfIn PDF document text
- http://driver-jazda.pl/upload/file/bufijekun.pdfIn PDF document text
- http://ahjygjg.com/upload_fck/file/2021-9-6/20210906215143124697.pdfIn PDF document text
- http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/88767124091.pdfIn PDF document text
- http://rpsbchamber.org/editorData/file/86971788398.pdfIn PDF document text
- http://lilipoupoli-drama.gr/lilipoupoli/js/ckfinder/userfiles/files/81478342292.pdfIn PDF document text
- https://dancleland.com/img/upload/file/29786214709.pdfIn PDF document text
- http://nobody-films.com/bpms/includes/fckeditor_uploads/userfiles/file/35889350014.pdfIn PDF document text
- https://latework.cz/soubory/zajetuxatev.pdfIn PDF document text
- http://kaushalacademy.org/ckfinder/userfiles/files/44901568604.pdfIn PDF document text
- http://spc1991.com/ckfinder/userfiles/files/40589833611.pdfIn PDF document text
- http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614889dbef8eb---dopefedirovewej.pdfIn PDF document text
- https://anmoul.com/userfiles/file/25338546582.pdfIn PDF document text
- https://habibitours.net/ckfinder/userfiles/files/71575396484.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_off0000c778.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC778	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000df8f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF8F	10552 bytes
SHA-256: `e428aac543dd648d6684316d6382217c8d80025990d6b49c16fcc498a237fa19`
`font_02_sfnt_off0000f7b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7B4	17176 bytes
SHA-256: `c9161ed2d9cfc04100edaab809c715e0f2247ca21fff091d02f716dcdc9ae245`

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