PDF malware analysis — malicious · ff2030e2d91d6226

MALICIOUS

PDF

71.3 KB Created: 2021-09-23 06:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 354a22f527d566ec7407a36c75622471 SHA-1: d5c06736f7218cf75f06e991e5caaf53dbbd7aaa SHA-256: ff2030e2d91d62263db3d1d8eef1e032dce1bc24e9f97588763f54cf9ad3e33e

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was flagged by ML and ClamAV as malicious, with critical and high severity heuristics indicating a phishing or trojanized PDF. Embedded JavaScript and a large number of external links, including one pointing to a potential phishing lure related to WhatsApp backups, strongly suggest a malicious intent to redirect users to compromised sites or download additional payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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://ketchas.ru/uplcv?utm_term=how+to+stop+whatsapp+chat+backup+on+android PDF link annotation
- https://ducthai.vn/userfiles/file/wugugopimiwesizeto.pdfIn PDF document text
- http://yonezawanet.jp/units/24250/zcycom/files/saxilunulotonenuwe.pdfIn PDF document text
- https://thegioibaobicarton.com/Images_upload/files/vedazazavamerev.pdfIn PDF document text
- https://arhstroi.by/uploads/files/xetojipunepuwo.pdfIn PDF document text
- https://charterboatdeliverance.com/uploads/files/vepumisidibaxipijosazoze.pdfIn PDF document text
- http://elhammagazine.com/ckfinder/userfiles/files/xaxupixeg.pdfIn PDF document text
- http://upoart.com/ckfinder/userfiles/files/57056071552.pdfIn PDF document text
- http://turar-mussin.com/userfiles/File/geminezesedikozizir.pdfIn PDF document text
- https://santa.my/images/users/00000000/files/96426108863.pdfIn PDF document text
- http://abnig.friendship-match.com/upload/files/mixemupomutexagepuled.pdfIn PDF document text
- https://bomando.bomsolar.com/uploadfiles/files/3068181758.pdfIn PDF document text
- https://tonthephunglan.vn/upload/files/dilimalekufirolexetum.pdfIn PDF document text
- http://obkladacstvikolar.com/content/pugunekosetamelugaviwu.pdfIn PDF document text
- http://daiichigroup.net/uploads/news_file/jedixedo.pdfIn PDF document text
- https://zibarajabi.com/cache/fck_files/file/gowurojasimoruzozep.pdfIn PDF document text
- http://gajagotour.com/UserFiles/file/21156742109.pdfIn PDF document text
- https://ustunbilgisayar.com/userfiles/files/pozefosol.pdfIn PDF document text
- http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16131cae1b3f14---89384081346.pdfIn PDF document text
- https://tractorpulling-emmeloord.nl/upload/file/23845150859.pdfIn PDF document text
- https://fotofidelity.cz/userfiles/file/letabefobobotozutanaf.pdfIn PDF document text
- http://wonderful-foods.net/userfiles/file/nepumufelutufojigenu.pdfIn PDF document text
- http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/sezimakusen.pdfIn PDF document text
- http://zs.tom.ru/jsplugins/ckfinder/userfiles/files/bugupeposovipop.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_off0000b5d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB5D2	10844 bytes
SHA-256: `4ad09c59699cc75d0e599c07474190e3cbb850ace8d21074f47aac6c0ba81d4f`
`font_01_sfnt_off0000ce99.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE99	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000e6ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6AB	15860 bytes
SHA-256: `94266cfae6adf4e2821b60f4f0d38a67ebc5ff5a66f9034beee791283105b151`

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