PDF malware analysis — malicious · a2e0e1e788ff159d

MALICIOUS

PDF

86.3 KB Created: 2021-09-11 23:32:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 3f4c01ce54ef628b79af9ca8c962104c SHA-1: 9eac97c3917598bcfbf6cf970b988e166d2f17e9 SHA-256: a2e0e1e788ff159d09952e1ef91bc05e3b3df326b5a967b5eaaec169d002443e

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for delivering malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam, given the numerous external URIs and the 'link farm' heuristic. The embedded JavaScript is likely responsible for redirecting the user to one of the numerous unknown URLs found in the document.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://by-express.com/upfiles/editor/files/mabavewetup.pdf In PDF document text
- http://lt101shop.com/userfiles/files/5408271267.pdfIn PDF document text
- http://sjar-tech.com/uploadfile/file///2021091119450446.pdfIn PDF document text
- http://studiocariola.com/userfiles/files/manomusovujibenidodula.pdfIn PDF document text
- https://rcot.org/userfiles/file/47582293545.pdfIn PDF document text
- https://oreopay57.com/ckfinder/userfiles/files/dolokubanaxuximifumobu.pdfIn PDF document text
- https://novahealthclinic.ca/userfiles/file/20635668135.pdfIn PDF document text
- http://purofirstli.net/userfiles/file/wuvexiziweluzoripumeminax.pdfIn PDF document text
- http://thekitchendesignstudio.org/uploads/files/67568600304.pdfIn PDF document text
- http://zhizhencn.com/filespath/files/20210910065740.pdfIn PDF document text
- http://glttek.com/userfiles/file/34926820309.pdfIn PDF document text
- http://tekizolasyon.com/ckfinder/userfiles/files/guvulademugifuleder.pdfIn PDF document text
- http://augustaelectricalwork.com/editorData/file/60882717666.pdfIn PDF document text
- https://soyana.de/js/ckfinder/userfiles/files/rijedokafulenubetadi.pdfIn PDF document text
- http://maslatalaia.com/userfiles/file/judelogajasupuxa.pdfIn PDF document text
- http://zjleiou.com/images/upload/File/kalemedobuvufuro.pdfIn PDF document text
- http://abwfinlay.com/uploads/files/37513588921.pdfIn PDF document text
- http://eko-inwest.eu/upload/file/xefobudilu.pdfIn PDF document text
- https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613299cb14309---90652192232.pdfIn PDF document text
- http://sherwoodchambergolf.com/ckfinder/userfiles/files/92890465671.pdfIn PDF document text
- https://rakowka.pl/userfiles/file/zomegifotesobevetol.pdfIn PDF document text
- https://breedlife.com/upload/files/2661581830.pdfIn PDF document text
- http://visusmarble.com/images_upload/files/fuxukuj.pdfIn PDF document text
- http://titadoorbinhduong.com/upload/files/bidanebukuganolosed.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=3d+world+map+for+androidPDF 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_off0000d9f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD9F0	17176 bytes
SHA-256: `5728cd38c22b338a0773a8e53a2341e683a5b16eeedfab82e9a46f54dc59b329`
`font_01_sfnt_off0001065c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1065C	17508 bytes
SHA-256: `ffaed86bf0af4f8d5f1d135240c99f821eb210af57c7d8121c23f215a3950671`
`font_02_sfnt_off000133c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x133C1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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