PDF malware analysis — malicious · d5be5028fde9f9f8

MALICIOUS

PDF

70.2 KB Created: 2021-10-04 01:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: 3f5e02b5e4c81a349ceb96a9097449be SHA-1: 4ba0f3f002e64a9712f11322d0a08ac648f53876 SHA-256: d5be5028fde9f9f8c07ad8d67945a5a619579bc826146978521e909037af186b

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable hosting, characteristic of a link farm designed to distribute malicious content or phish users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

Heuristics 5

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.
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://philabc.ru/uplcv?utm_term=reading+for+personal+growth PDF link annotation
- http://antopol.topmebli.com/content/xuploadimages/file/44451456625.pdfIn PDF document text
- http://canphantich.net/Images_upload/files/73123019963.pdfIn PDF document text
- https://egokituz.eus/files/galeria/files/78754488656.pdfIn PDF document text
- http://rund.cz/UserFiles/File/xaguto.pdfIn PDF document text
- http://www.pantonerestauri.com/ckfinder/userfiles/files/95005344648.pdfIn PDF document text
- http://rucodelniza.ru/userfiles/file/44898336451.pdfIn PDF document text
- http://kimhoatra.vn/upload/fckimagesfile/72397289973.pdfIn PDF document text
- https://www.fangjin.org/ckfinder/userfiles/files/sudogabidufofemupaf.pdfIn PDF document text
- https://clubelsendero.com/img_pag/file/36053935819.pdfIn PDF document text
- https://www.speeddating.lt/speeddating/ckfinder/userfiles/files/16676711201.pdfIn PDF document text
- http://madiran-cruduparadis.fr/ckfinder/userfiles/files/nimaratekob.pdfIn PDF document text
- http://studioguagnoni.it/userfiles/files/8566082226.pdfIn PDF document text
- http://evo-models.com/uploads/userfiles/files/28998634432.pdfIn PDF document text
- http://le383.com/uploads/files/80850831466.pdfIn PDF document text
- https://voziky-paletove.cz/mctree.cz/pictures/other/files/parukawojajidazexiwidek.pdfIn PDF document text
- http://www.peritaonline.es/ckfinder/userfiles/files/53755945595.pdfIn PDF document text
- http://stonebreaker.at/lubazixoguse.pdfIn PDF document text
- http://eventclub.pl/userfiles/file/20814052100.pdfIn PDF document text
- http://doorsatyrau.com/ckfinder/userfiles/files/fusefimopajefabelef.pdfIn PDF document text
- https://xosobacninh.vn/webroot/img/files/49245882142.pdfIn PDF document text
- https://gaadalagi.com/contents/files/tituxolika.pdfIn PDF document text
- http://dayou.tw/uploadpic/files/202109040346425602.pdfIn PDF document text
- https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/8ohpglh8v4fh022i08lvnerfri/78977284916.pdfIn PDF document text
- http://chanhungcorp.com/images/uploads/files/novoregi.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_off0000afd8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAFD8	16624 bytes
SHA-256: `00fd5b9fb4f42c6d1e313da409800c0d00a9fb70306f4429f3c86b08cae9fda7`
`font_01_sfnt_off0000da81.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA81	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f298.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF298	10908 bytes
SHA-256: `a2596d93cba7800e84b4e46b3b91a047ccca30ac428c484503720738b90d4e77`

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