PDF malware analysis — malicious · 4cd9ea83b13af3d5

MALICIOUS

PDF

81.3 KB Created: 2021-09-12 09:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 099d79fc940c46be6d6872a438277e0d SHA-1: 0afab339a5818295c166a5009b444f29fab10052 SHA-256: 4cd9ea83b13af3d5e06173a2779218a29d9ea7e1c08f45115b8bc757abce7e2f

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also hosts a large number of external URLs, many of which appear to be part of a link farm, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to download and execute a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://krisoc.ru/uplcv?utm_term=how+do+i+change+my+phone+wallpaper PDF link annotation
- https://egyptsuntours.com/userfiles/files/77897229858.pdfIn PDF document text
- http://ufcnagykanizsa.hu/userfiles/file/mojerejigevake.pdfIn PDF document text
- http://fsoa.cn/userfiles/file/2468708401.pdfIn PDF document text
- http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613345fe768e0---4585340044.pdfIn PDF document text
- http://garage-fuji.jp/js/upload/files/lesuvejomodolot.pdfIn PDF document text
- http://autothudo.vn/upload/fck/file/60600815371.pdfIn PDF document text
- http://easyhypermarket.com/userfiles/file/dotexexinunala.pdfIn PDF document text
- http://www.deco-interieure.com/userfiles/file/vexatokasamovo.pdfIn PDF document text
- http://lexuspolymers.com/assets/ckfinder/userfiles/files/zujobuwi.pdfIn PDF document text
- https://nhabe.com.vn/ckfinder/userfiles/files/godokadofazotapagazi.pdfIn PDF document text
- http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/161317fd1dd690---farelew.pdfIn PDF document text
- http://king-pro.com/userfiles/files/zenaxeg.pdfIn PDF document text
- http://studioingtassinari.eu/userfiles/files/lusasifo.pdfIn PDF document text
- http://rhoptik.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/98006701617.pdfIn PDF document text
- https://ikorti-iao.com/userfiles/files/78964097983.pdfIn PDF document text
- http://gamax-moto.cz/data/dokumenty/22742146667.pdfIn PDF document text
- https://www.travelknowhowscotland.co.uk/assets/js/ckfinder/userfiles/files/sirozuparotu.pdfIn PDF document text
- http://piri-piri.pl/ckfinder/userfiles/files/kujafosuzo.pdfIn PDF document text
- http://thetsaban3watnuea.com/UserFiles/file/biwiwipafofawe.pdfIn PDF document text
- http://sintellect.ru/Repository/file/75713523683.pdfIn PDF document text
- http://gildiamasterov.ru/userfiles/file/17994476190.pdfIn PDF document text
- http://fertilityupdates.com/userfiles/files/duverivow.pdfIn PDF document text
- http://tnslib.su/userfiles/files/duzetotun.pdfIn PDF document text
- http://studiovalecchi.it/userfiles/files/wovatuz.pdfIn PDF document text
- http://lmtechsolution.com/userfiles/77343804787.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_off0000d966.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD966	17480 bytes
SHA-256: `6007314db5470d9fdb8a1db3876f38ddc405a13f670ee78efb1886469848564b`
`font_01_sfnt_off00010676.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10676	10888 bytes
SHA-256: `8085a388719240756d561bc472d8ae6bd482bc54f478ad98df6ee25f33f49471`
`font_02_sfnt_off00011f2f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F2F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.