PDF malware analysis — malicious · 693975a6dd8bb94e

MALICIOUS

PDF

73.2 KB Created: 2021-09-16 18:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20

MD5: b9d70fa07d0b3798ed51ec508bb8dc13 SHA-1: fd30f4531bd19edd06d37a61b86a49b6e3b7fa1b SHA-256: 693975a6dd8bb94e2c8d1a58afaabfdce6c8333213ab9df56f62ba7ed3cbb600

134 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also contains numerous external URIs, many of which point to suspicious domains and are likely used to host further malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 6

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.
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://reyazahmad.bscsaoner.in/ckfinder/userfiles/files/mezafig.pdf In PDF document text
- http://coumert.com/images/file/xifujut.pdfIn PDF document text
- https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613701221a915---wufupapibesogo.pdfIn PDF document text
- https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/ahq7bl9125phve3a5d8o7l8j4t/kegepakirigasunexinurul.pdfIn PDF document text
- https://binarbaidservices.com/public_html/userfiles/file/29351280827.pdfIn PDF document text
- http://www.hro.ait.ac.th/js/ckfinder/userfiles/files/81260113359.pdfIn PDF document text
- http://sinoorchids.com/image/file/36056623479.pdfIn PDF document text
- https://ltssinternational.com/res/wysiwyg/file/sabemamen.pdfIn PDF document text
- http://bndweb.nl/upload/files/navutorixoxamotejubibirap.pdfIn PDF document text
- http://www.parinet.fi/tiedostot/files/gedebuligafikejizi.pdfIn PDF document text
- http://appli-veolia.net/ckfinder/userfiles/files/25339614080.pdfIn PDF document text
- https://a-metal.e-giant.net/archive/file/files/tekutebalemezesuvixokuso.pdfIn PDF document text
- http://hulstcustoms.ru/uploads/files/41812125303.pdfIn PDF document text
- https://giriconsultancy.com/content_files/files/99289024330.pdfIn PDF document text
- http://master-br.ru/img/file/75715242981.pdfIn PDF document text
- https://goacetours.com/ckfinder/userfiles/files/tewerobarokedi.pdfIn PDF document text
- https://weborder.cloud/userfiles/file///wupagosupenusexotaxo.pdfIn PDF document text
- http://wadirumshootingstars.com/userfiles/file///tatuvosotaru.pdfIn PDF document text
- https://mehreganimaging.com/images/upload/files/61056278738.pdfIn PDF document text
- http://www.mostex.sk/files/articles/file/93390565639.pdfIn PDF document text
- http://aluminial.pnh.pt/js/ckfinder/userfiles/files/loxuwukekokerujidiv.pdfIn PDF document text
- http://oawebserver.com/piceditor/file/ridojutagabew.pdfIn PDF document text
- https://vinamex.info/uploads/news_file/purin.pdfIn PDF document text
- http://mehmetrasimmutlu.com/icerik/file/zuponumidexumikeju.pdfIn PDF document text
- https://www.khaosanpools.org/ckfinder/userfiles/files/berenuvejibivifunoz.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=pdf+class+10+sciencePDF 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_off0000ba1a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBA1A	10328 bytes
SHA-256: `d6ffb716c4722994e68d8b325075af03264b2f0971d7d2d5ef87809e018b2ced`
`font_01_sfnt_off0000d182.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD182	17808 bytes
SHA-256: `f5401c6370141b4b762bc003611579f08f908a874048dc93fc88447079d98218`
`font_02_sfnt_off0000ff2c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF2C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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