PDF malware analysis — malicious · 9d499dcab0dc1229

MALICIOUS

PDF

82.1 KB Created: 2021-09-08 14:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 72de0b0fb5f4261da0b030c26a6312c2 SHA-1: afce8c6fa280a68185ff7e9bda91413b85983402 SHA-256: 9d499dcab0dc12291a2f6691aebdaf040278b17dfce7fb1f084f455056d6c4c4

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for malicious PDFs to execute code or redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host numerous links, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

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 https://stoneappeal.in/FCKeditor/file/nugadubu.pdf In PDF document text
- https://khonggiansangtao.com/platformecom/img/upload/file/zujonuzixujak.pdfIn PDF document text
- https://galaxy-training.com/userfiles/file/465947834.pdfIn PDF document text
- http://latiendasegura.com/contable_prueba/userfiles/file/sibimarevakejulisoga.pdfIn PDF document text
- http://daugiavanthienphuoc.com/media/ftp/file/bopivamitipe.pdfIn PDF document text
- https://celebicatering.com/upload/ckfinder/files/jufija.pdfIn PDF document text
- https://www.prshots.com/ckfinder/userfiles/files/revavajomanemewaviniwewe.pdfIn PDF document text
- http://ximangsongthao.com/app/webroot/uploads/files/xafukivasi.pdfIn PDF document text
- http://yonezawanet.jp/units/24250/zcycom/files/vopimegobakin.pdfIn PDF document text
- https://chachachat.info/js/ckfinder/userfiles/files/51402538849.pdfIn PDF document text
- http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/52584166619.pdfIn PDF document text
- https://repetitorebi.ge/userfiles/files/lemupifunasawedozasefu.pdfIn PDF document text
- http://luxlustry.ru/img/upload/29264569374.pdfIn PDF document text
- http://atdawnwelift.com/userfiles/file/81354136367.pdfIn PDF document text
- https://kopari.hu/files/file/sujibolobopifu.pdfIn PDF document text
- https://www.southdownscellars.co.uk/ckfinder/userfiles/files/29506177883.pdfIn PDF document text
- https://aqua2go.pl/galeria/file/58450245597.pdfIn PDF document text
- https://esportenerd.com/app/webroot/ckfinder/userfiles/files/85468147025.pdfIn PDF document text
- http://appartementslisa.it/an3_Uploads/file/bonazawag.pdfIn PDF document text
- http://jandenzobv.com/image_uploads/file/xogezofezorusidirod.pdfIn PDF document text
- https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382f9560d15---42282477840.pdfIn PDF document text
- http://world-housing.jp/ckfinder/userfiles/files/weteguko.pdfIn PDF document text
- https://shevian.com/images/file/mererobukenotux.pdfIn PDF document text
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec6365e241---44423447554.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=baumanometro+partes+pdfPDF 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_off0000dbd6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBD6	10672 bytes
SHA-256: `a9d99d386e5acfa87a6ce373a1599d386c38c8e7ca0972b603c51d75ae761a4d`
`font_01_sfnt_off0000f451.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF451	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010c63.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C63	18316 bytes
SHA-256: `f0fe06595d42487b005adc0a0e279adfe3fdfadd83c7feec20c141edfd50ac43`

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