PDF malware analysis — malicious · d2248899f5228a83

MALICIOUS

PDF

83.2 KB Created: 2021-09-21 11:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 589b1c44616af21dde839d63d3623506 SHA-1: 1711cb79a9fc85edfa06bb30fe08c1adee80f620 SHA-256: d2248899f5228a8320dea9a7cbbc1593f720163688d2dd80ec4c31e4ec06c10e

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, with one specifically disguised as a 'telegram lite download' link. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing or malware distribution site. The presence of embedded JavaScript suggests it may be used to obfuscate the redirection or initiate further malicious actions.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

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://pistant.ru/uplcv?utm_term=telegram+lite+download PDF link annotation
- https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16148f79e66b07---56563102055.pdfIn PDF document text
- https://sanmuabancongty.vn/images/content/files/vezalefekugozu.pdfIn PDF document text
- https://bonaparte.cappencms.com/templates/files/xoxesomukog.pdfIn PDF document text
- https://lean-ds.com/upload/editor/file/gizarisikudebukitoxana.pdfIn PDF document text
- http://market-oborudovanie.ru/upload/file/77756848994.pdfIn PDF document text
- https://villadelauca.com/userfiles/file/nilibopukepababusodivejab.pdfIn PDF document text
- http://coeb.eu/userfiles/files/sukapedutowimoravijiki.pdfIn PDF document text
- https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0b4c2a3ec---30815117164.pdfIn PDF document text
- https://ketex.com/trcgp/ckfinder/userfiles/files/88381381973.pdfIn PDF document text
- http://realestatemiami.com/userfiles/files/1714904045.pdfIn PDF document text
- http://thcscatquea.hoaiduc.edu.vn/ckfinder/userfiles/files/35762335066.pdfIn PDF document text
- http://ecme.site/2015/vat/upload/files/65863365072.pdfIn PDF document text
- http://edv-denk.com/userfiles/file/39156495792.pdfIn PDF document text
- https://piti.leaddeehub.com/userfiles/files/63593372828.pdfIn PDF document text
- http://www.hro.ait.ac.th/js/ckfinder/userfiles/files/kigexuvenazakapixotepado.pdfIn PDF document text
- http://nabisori.com/userfiles/file/sibanerupazabopanizetotu.pdfIn PDF document text
- https://www.agencesramos.com/ckfinder/userfiles/files/38545640389.pdfIn PDF document text
- http://heathrowairporttaxi.website/userfiles/file/tetabudaruweg.pdfIn PDF document text
- http://epodhajska.eu/UserFiles/File/68238330805.pdfIn PDF document text
- https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/161439d50a5a48---gutogopudukas.pdfIn PDF document text
- http://scamps.biz/userfiles/file/gigazalezagadakotaguz.pdfIn PDF document text
- http://sanarina-coaching.de/ckfinder/userfiles/files/58723426998.pdfIn PDF document text
- https://cakamuzejs.riga.lv/ckfinder/userfiles/files/97911925101.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_off0000e148.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE148	17796 bytes
SHA-256: `b3c7b38b634e27b9d89d7274f2b55e93dfd361348bf5060e8f778bf0c1e1e016`
`font_01_sfnt_off00010f41.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F41	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012758.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12758	10472 bytes
SHA-256: `0350c8e96230097fb63ef11dfe82cd08120d8d119617c3139179e8f63d457af1`

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