PDF malware analysis — malicious · 41ca8696b14cdbf5

MALICIOUS

PDF

83.0 KB Created: 2021-09-17 23:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 60c9978142f4748dd4ec9ed9d25786ef SHA-1: f508187b55f6c3e755bdf4130e251b8564f1b5eb SHA-256: 41ca8696b14cdbf5c4c6d60fe543fc173fce23843f42e4859b0e36112d4f4422

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URLs, indicating a malicious intent to lure the user into a phishing scenario. The critical heuristic 'SE_SECRET_RECOVERY_LURE' strongly suggests the document's purpose is to trick users into divulging sensitive recovery information. The ML classifier also flagged this PDF with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9960

Heuristics 7

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE

Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
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://yodishit.com/uploads/userfiles/file/garurobozijilemopedora.pdf In PDF document text
- http://3asoft.vn/img/files/nevujexasus.pdfIn PDF document text
- http://soojuspilt.ee/files/file/wiribofe.pdfIn PDF document text
- https://menokatea.com/ckfinder/userfiles/files/84995261961.pdfIn PDF document text
- http://cpgny.com/userfiles/files/wusirakafagekepidos.pdfIn PDF document text
- https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf64e2e9f7---tobasulopevupuxuvasoxasam.pdfIn PDF document text
- http://chelseafoodmart.com/uploads/files/38190348728.pdfIn PDF document text
- https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613269b4e4046---60163643411.pdfIn PDF document text
- http://xn--82ca1bkibi6eufn5bh1b7i3e.com/UserFiles/File/65095276324.pdfIn PDF document text
- http://travellerisland.com/files/77293393076.pdfIn PDF document text
- http://nagakuratrading.com/js/upload/files/65581128844.pdfIn PDF document text
- https://slide-bearing.com/d/files/19807028576.pdfIn PDF document text
- http://www.gabrielamaciel.net/images/content/file/fereguletup.pdfIn PDF document text
- https://aslplastic.com/ckfinder/userfiles/files/xisudato.pdfIn PDF document text
- https://menu2uplus.com/images/file/nupiwovafoxudus.pdfIn PDF document text
- https://syntellect.ru/Repository/file/febomokumokitopobimewo.pdfIn PDF document text
- http://autoscuolapezzano.it/userfiles/files/ludagodovaxufulasemiv.pdfIn PDF document text
- http://tw-tms.com/uploadpic/xw/files/binojowagug.pdfIn PDF document text
- http://h-p-n.fr/catalogue_dynamique/file/94102252328.pdfIn PDF document text
- https://gmnavarra.es/ckeditor/files/forurajamukixakis.pdfIn PDF document text
- http://jayeonrak.com/upfile_editor/2021/files/vadojiximijon.pdfIn PDF document text
- http://immobilieninvestors.com/userfiles/file/26195842168.pdfIn PDF document text
- https://vishalahospitality.com/ckfinder/userfiles/files/pulibud.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=what+is+a+virtual+keyboard+on+androidPDF link annotation
- 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_off0000dd44.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD44	10848 bytes
SHA-256: `acb21bdd335d2b80817ba49245bc23ed04658864b7267c7f03db702cb2c9d46c`
`font_01_sfnt_off0000f64e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF64E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010e60.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E60	18524 bytes
SHA-256: `a0fb7f02d50348f1c40cac7309f5a8303fa31c61e059c579ba0f2b6293762db2`

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