PDF malware analysis — malicious · 34454924c454b501

MALICIOUS

PDF

90.9 KB Created: 2021-09-18 13:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: ba4a0a586920a4128a3f90f16c29da04 SHA-1: 1aa8d501db3d7bb63e07d3d55f8880f333f5413e SHA-256: 34454924c454b501e9111334d5e659f8cb3d32c3746d846f90543a2904179e60

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. The presence of numerous embedded URLs, many pointing to disposable domains, suggests a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9970

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://medvor.ru/uplcv?utm_term=empire+how+britain+made+the+modern+world+pdf PDF link annotation
- http://staceyasp.com/UserFiles/file/37997484029.pdfIn PDF document text
- http://impactpluslearning.com/ckfinder/userfiles/files/jinugumitenaxifegifete.pdfIn PDF document text
- http://yachtandgulet.com/userfiles/file/10964671091.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/dqg0rk7r81usm8b9u3780s21l3/fajakevisopukumel.pdfIn PDF document text
- http://atenngo.com/admin/sites/site/documents/doribafapuvipat.pdfIn PDF document text
- https://giltmorestukko.hu/ckfinder/userfiles/files/vubatumigulo.pdfIn PDF document text
- http://ordinate-ltd.com/file_media/file_image/file/48759648355.pdfIn PDF document text
- http://shangrilayunnan.com/ckfinder/userfiles/files/revezugomafikara.pdfIn PDF document text
- https://cuatudongsaigon.net/uploads/files/wemanetuloluraloka.pdfIn PDF document text
- https://mlbcsimleague.com/ckfinder/userfiles/files/39167247854.pdfIn PDF document text
- http://secohthailand.com/file_media/file_image/file/bubure.pdfIn PDF document text
- http://nagymester.com/userfiles/file/22959333864.pdfIn PDF document text
- http://kingswaytyres.com/project/kingsway/uploads/file/71512415748.pdfIn PDF document text
- https://fortworthdental.net/cmsCart/upload/file/pawepuniza.pdfIn PDF document text
- https://ezokniga.com/uploads/file/fixabitodobusobujubofer.pdfIn PDF document text
- http://4reality.cz/userfiles/files/ferosawakizujupasosiwamut.pdfIn PDF document text
- https://fceresources.com/ckfinder/userfiles/files/nizolepij.pdfIn PDF document text
- http://toonesk.com/upload/48836400229.pdfIn PDF document text
- http://radio-salsa.com/php/rs/filesupload/file/zedulunuvijizotifavalojax.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c77a7b411---sexaranupalivege.pdfIn PDF document text
- http://topbondtape.com/uploadss/file/14134814091.pdfIn PDF document text
- http://vincentianssjp.com/userfiles/file/1134245559.pdfIn PDF document text
- http://wwm-quanta.com/upload/files/90644687950.pdfIn PDF document text
- http://brandweeramsterdamamstellanden.nl/userfiles/file/zumakawutenatadizasipu.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_off0000fe38.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE38	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001164f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1164F	10804 bytes
SHA-256: `b8d6d6b44262d674c5be950b9f003f52a4206ba7014888247f18a88ef231f5e1`
`font_02_sfnt_off00012ebd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12EBD	18200 bytes
SHA-256: `0b8b5f208762f473a7e7ee442e3cf410504aa74bd8d860c13b2615a7b839765a`

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