PDF malware analysis — malicious · bb43ad952543ca7d

MALICIOUS

PDF

86.7 KB Created: 2021-09-13 23:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: eca9d3984ccabde45fcb67ac076408b6 SHA-1: ad65f3ccab8565ade4fdb1a012bb2426991a2da4 SHA-256: bb43ad952543ca7dfd3e6e5f31a53cf9a72f265543ab62aede0a51f3a7761169

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to potentially malicious or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting the user to these external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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 http://stoka-saarlouis.de/userfiles/file/wifivapina.pdf In PDF document text
- http://thankschicken.com/uploads/files/20146771102.pdfIn PDF document text
- http://www.77ice.com/upload/files/3034547709.pdfIn PDF document text
- https://oddluzanie.net/userfiles/file/86877550288.pdfIn PDF document text
- http://volvo-cars.jp/js/upload/files/lotumokibajupusitifuwozuj.pdfIn PDF document text
- http://tunesistudio.eu/userfiles/files/varorofuwikewewoxedune.pdfIn PDF document text
- http://thibangoto.com/app/webroot/uploads/files/40668994185.pdfIn PDF document text
- http://scarpatti.com/files/guditidinutibeboxirus.pdfIn PDF document text
- https://coffeetuanvang.com/Images_upload/files/30111379455.pdfIn PDF document text
- http://uticachemical.com/files/upload/files/30768140409.pdfIn PDF document text
- http://argyleliquidations.com/userfiles/files/bakozik.pdfIn PDF document text
- http://www.amanuttarakhand.org/ckfinder/userfiles/files/lidebebawaganizilik.pdfIn PDF document text
- http://chinazzjx.com/d/files/rebinigejirazitevefi.pdfIn PDF document text
- https://cribpointonline.org/cribpointonline/userimages/file/woxarimutepiwovu.pdfIn PDF document text
- http://enjoy.sk/editor_uploads/system/files/tuzarekulapifisakelisavuz.pdfIn PDF document text
- http://szyoujin.com/UploadFile/file/20210909010445673.pdfIn PDF document text
- https://taxfirma.com/userfiles/file/96929005633.pdfIn PDF document text
- http://zsmnowakowski.pl/userfiles/file/26375173050.pdfIn PDF document text
- https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/xasileganumejepumi.pdfIn PDF document text
- http://www.culturehousesun.org/photos/file/nibijudugebasuvisis.pdfIn PDF document text
- http://3qbuy.com/CKEdit/upload/files/62156137855.pdfIn PDF document text
- https://aluminiosarla.com/userfiles_arla/files/63240125327.pdfIn PDF document text
- http://tythb.com/uploadfile/files/51884289972.pdfIn PDF document text
- https://rdw-wolf.de/backend/ckfinder/userfiles/files/rugirifoxovibijelodafi.pdfIn PDF document text
- https://pvcmikser.com/upload/files/15309853644.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=ios+launcher+for+windows+7+pc+free+downloadPDF 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_off0000ea20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA20	10804 bytes
SHA-256: `19834fe7b3e674823c56977664bbaa69618573e4c373ed3d1b5452b174b3f69a`
`font_01_sfnt_off00010302.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10302	18816 bytes
SHA-256: `d25f1d4db63d694beef0a2cf6dd31d137069d6156a2821a0104809ec898816f8`
`font_02_sfnt_off00013418.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13418	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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