PDF malware analysis — malicious · 90777d963b7463d9

MALICIOUS

PDF

77.8 KB Created: 2021-09-09 11:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 00846449ae4fd0dee1892dcae83df1a9 SHA-1: 89427518b45ac40c6c79026529f89d7ac61d5b37 SHA-256: 90777d963b7463d99e638e38da8b2d87299b5768cdadb5670f01dc4cb13edaf0

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, identified as a link farm, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were directly extracted, the PDF structure and embedded links are indicative of malicious intent, likely leading to further compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.7444

Heuristics 4

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
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://foxadv.net/file/53703587355.pdf In PDF document text
- https://sacc-la-chaux-de-fonds.ch/fichiers/file/ratowogar.pdfIn PDF document text
- http://pc75.net/upfiles/file/1630808041.pdfIn PDF document text
- http://riskhedgetech.com/uploaded/file/1146792813612f94946d9c6.pdfIn PDF document text
- https://ermolino.mebel18.com/uploads/files/wudadibibulujusowilun.pdfIn PDF document text
- http://sgo-bage.com/public/files/files/71554964893.pdfIn PDF document text
- https://vayamcs.com/content_files/files/7230656708.pdfIn PDF document text
- https://www.leasing.net.in/ckfinder/userfiles/files/votijib.pdfIn PDF document text
- http://lionsmarsala.it/userfiles/files/kepajunajiruresokoke.pdfIn PDF document text
- http://tvtamminhphat.com/uploads/userfiles/file/jiwuwimavitubukez.pdfIn PDF document text
- http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/02844e3322bdd57e182f3cc0290f521c/potarulewokawejofizemiru.pdfIn PDF document text
- https://hogozaty.com/ckfinder/userfiles/files/kugivoliwewarodiri.pdfIn PDF document text
- http://putzlappenborner.at/editor_up/tiranalip.pdfIn PDF document text
- http://www.anclupnapoli.it/userfiles/file/50815381329.pdfIn PDF document text
- https://2-view.org/home/view/public_html/ckfinder/userfiles/files/29492811793.pdfIn PDF document text
- http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/568e8127086cf922a11f23b696e097f4/41306990949.pdfIn PDF document text
- http://whitedwarf.ru/public/images/ckfinder/files/29581164886.pdfIn PDF document text
- http://geoman.cz/data/file/22462379390.pdfIn PDF document text
- http://karmand24.ir/basefile/ehotel724ir/files/93440209571.pdfIn PDF document text
- http://studiotecnicoligioni.com/userfiles/files/61297964590.pdfIn PDF document text
- http://oikoscoccatoarchitettura.com/userfiles/files/magowufafavoviralobi.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=office+365+incoming+serverPDF link annotation
- 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_off0000da7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA7F	10936 bytes
SHA-256: `2e52dfa3696c0e8e00aa9aa2a47532a62e464061f809b8e7cca7ce4fd9e28102`
`font_01_sfnt_off0000f3e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3E1	17316 bytes
SHA-256: `81dd60510b5f0bb89ddca44f19e5931844885178d74a05c107543f21f64c8e5a`
`font_02_sfnt_off0001207f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1207F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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