PDF malware analysis — malicious · d56165bfb12744b0

MALICIOUS

PDF

80.6 KB Created: 2021-09-11 06:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 02c25357c7467ebf78115584a746ec73 SHA-1: 37e772af6852317cdf5141da770fed0d8d8e52cf SHA-256: d56165bfb12744b07273ea6e53854f0c07abf25c32f597cca555f89a4ce4a431

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm on disposable hosting. The PDF contains numerous embedded URLs, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to compromised or malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9987

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://irlanc.ru/uplcv?utm_term=zenitsu+wallpaper+hd+android PDF link annotation
- http://izumrud38.com/ckfinder/userfiles/files/ladotomobigisunugogibogo.pdfIn PDF document text
- http://www.ih-consultant.com/ckfinder/userfiles/files/98612365794.pdfIn PDF document text
- http://vivaibonomo.it/userfiles/files/peneme.pdfIn PDF document text
- https://szelvedojavitasmiskolc.hu/files/files/16878224122.pdfIn PDF document text
- http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/xigilirijarivo.pdfIn PDF document text
- http://inoxbienhoa.com/upload/files/nowalepopujal.pdfIn PDF document text
- http://cngwalk.com/fckeditor/userfiles/image/71985885097.pdfIn PDF document text
- https://vayamcs.com/content_files/files/55368506785.pdfIn PDF document text
- http://lsbwg.com/ckfinder/userfiles/files/20210907/1523185499.pdfIn PDF document text
- http://studiobonvino.com/userfiles/files/simojesepanagowig.pdfIn PDF document text
- http://staractivecollection.com/resimler/site/files/69709642147.pdfIn PDF document text
- http://www.southpointinstitutehowrah.com/admin/uploads/file/49268486529.pdfIn PDF document text
- https://villatoscana-pi.it/userfiles/file/kexazamorolasiniviz.pdfIn PDF document text
- https://denizlihorozu.com/resimler/files/pilolujuzesometezawu.pdfIn PDF document text
- http://www.ville-dammarie.com/ckfinder/userfiles/files/23078844028.pdfIn PDF document text
- http://druckmaschinenservice.com/uploads/fce/files/35807231272.pdfIn PDF document text
- http://hkacca.com/userfiles/fugeropezowidenunowa.pdfIn PDF document text
- http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161347d6a5c7ce---pejozikuzobajusukuli.pdfIn PDF document text
- http://alkanboya.com/files/file///satumokate.pdfIn PDF document text
- http://yizhu580.com/ckfinder/userfiles/files/71012092801.pdfIn PDF document text
- https://essuances.com/ckfinder/userfiles/files/remizadefafevujaxisowived.pdfIn PDF document text
- https://tatsolarlight.com/uploads/files/31328671293.pdfIn PDF document text
- https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/70510877458.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_off0000d801.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD801	17052 bytes
SHA-256: `afac91c1c4287a8bc61f91fe7d62220aec5f3fb2079ccd1f755743999ed021af`
`font_01_sfnt_off00010459.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10459	10636 bytes
SHA-256: `4cfc7c415e4861836000a4f4a472ef2019eba5ff2557aad0cfd7659c22c5967f`
`font_02_sfnt_off00011cbb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CBB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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