PDF malware analysis — malicious · a0ae892fb4e621e9

MALICIOUS

PDF

75.5 KB Created: 2021-09-17 19:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: f026201e22512da228a720eca5d7ca46 SHA-1: 6ed31906c068539fb729a0052ac7573da0009280 SHA-256: a0ae892fb4e621e9d20bf030d2e1977d260f9b865603d5e2f84b4d8ccd1151f8

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a large number of links pointing to disposable hosting, reinforcing the phishing or malware distribution intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://queure.ru/uplcv?utm_term=alarm+app+with+math+problems PDF link annotation
- https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/0b7227cb8d355ef8791eeab8bd781822/65567892891.pdfIn PDF document text
- https://atavio.ru/files/file/vamepugupawo.pdfIn PDF document text
- http://vagtteam.dk/userfiles/Files/gagig.pdfIn PDF document text
- http://adice-area.com/pictures/files/rukezirezidagewituk.pdfIn PDF document text
- https://universal4shipping.net/userfiles/file/37015193139.pdfIn PDF document text
- http://divorcefinance.nl/uploads/file/68906376041.pdfIn PDF document text
- http://exmar.it/foto_fck/file/mofolovejumesogir.pdfIn PDF document text
- http://terredellamagnagrecia.com/userfiles/files/79193461374.pdfIn PDF document text
- http://stauarchitetti.eu/userfiles/files/jalesoponogila.pdfIn PDF document text
- https://mps-india.com/userfiles/files/sopinikowijakimawubodig.pdfIn PDF document text
- http://imapbook.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/namefetufebemerenut.pdfIn PDF document text
- http://hissekurban.com/resimler/files/21186904080.pdfIn PDF document text
- https://krusomying.com/data/file/789754462.pdfIn PDF document text
- http://hakanhurdacilik.com/userfiles/file/pigoxomerawufoz.pdfIn PDF document text
- http://ipceurope.eu/assets/file/22718492127.pdfIn PDF document text
- https://saikekanglun.com/filespath/files/20210912220248.pdfIn PDF document text
- http://ccsl.asia/files/41983373222.pdfIn PDF document text
- http://vom-ragnaroek.de/uploads/file/93153663641.pdfIn PDF document text
- http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/fudilele.pdfIn PDF document text
- http://vanharteyoga.nl/uploads/files/28892736103.pdfIn PDF document text
- http://icaalliance.org/filespath/files/20210914100747.pdfIn PDF document text
- http://akkoryazilim.com/userfiles/file/ravameboneje.pdfIn PDF document text
- https://avphunter.ro/ckfinder/userfiles/files/nubikudomevobobebu.pdfIn PDF document text
- https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614039615cbd1---77179358104.pdfIn PDF document text
- http://sasmedm.com/www/js/ckfinder/userfiles/files/pabunevodanijenoxulo.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_off0000c473.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC473	16980 bytes
SHA-256: `589fa77331d5b3e39d18a5f8509d35b1a408fda5648c9dda941e96cfe8cb2ac9`
`font_01_sfnt_off0000efe7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFE7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000107fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107FE	10620 bytes
SHA-256: `79e7179ab1edc2812ce3910d9efd9e20878dfde177aab2c9ca42bc1725940cd0`

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