PDF malware analysis — malicious · 6836b9700632cc86

MALICIOUS

PDF

86.4 KB Created: 2021-09-12 02:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: e0da5fba85db732e2e0d549414fd441b SHA-1: 0d7b92bb6af492dd88e6fe48de1afdc506547301 SHA-256: 6836b9700632cc86efab9f9ad8fce8b884a0c7e993e690ab1a1fb716b0491caf

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier. A critical heuristic indicates a lure for clipboard command execution, suggesting the document instructs users to copy and paste content into a shell. This is a common technique to bypass security measures and execute malicious commands, likely to download and run a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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
Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE

Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
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://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1d6dcc265---49814676751.pdf In PDF document text
- http://fcraregistration.com/UploadedData/file/2107001036.pdfIn PDF document text
- http://naviway.su/upload/files/kazutejok.pdfIn PDF document text
- http://ptairsupply.com/userfiles/file/kivekudejuladaxu.pdfIn PDF document text
- http://intranet.uts.edu.co/portal/app/ckfinder/userfiles/files/nuvufe.pdfIn PDF document text
- https://sadex.pl/fck/file/5533352542.pdfIn PDF document text
- https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/betafogak.pdfIn PDF document text
- http://cukiernia.eu/upload/files/20890584286.pdfIn PDF document text
- https://xn--p3t29jo1ed4o4xw.tw/upload/files/wanaset.pdfIn PDF document text
- http://culfordequestriancentre.org/UserFiles/file/6127676495.pdfIn PDF document text
- https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132633cd41b5---netojokizefitofuweboni.pdfIn PDF document text
- http://clair-environnement.eu/catalogue_dynamique/file/pezavebesepujedejixel.pdfIn PDF document text
- https://ietc-oman.saktoon.com/userfiles/files/56166008287.pdfIn PDF document text
- http://www.casasemio.com.br/ckfinder/userfiles/files/nosepakifomepevuzegor.pdfIn PDF document text
- http://osteriadelcampanile.com/userfiles/files/17233091316.pdfIn PDF document text
- https://accesoriosalmayor.com/images/userfiles/file/jopibuwelaxezonamulugo.pdfIn PDF document text
- https://12waktu.com/contents/files/gividodejafut.pdfIn PDF document text
- http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/gawig.pdfIn PDF document text
- https://ladachess.ru/userfiles/file/nepetezazufan.pdfIn PDF document text
- https://whatshoulditcostme.com/userfiles/file/78213386128.pdfIn PDF document text
- http://ros.by/ckfinder/userfiles/files/fedomedulafipumudivuw.pdfIn PDF document text
- http://syarmarka.ru/userfiles/files/mareb.pdfIn PDF document text
- http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/mafajojevigajivob.pdfIn PDF document text
- https://abrasco.org.br/ckfinder/userfiles/files/binodisefalomisapubu.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=female+structure+of+a+flowerPDF 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_off0000f02f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF02F	10464 bytes
SHA-256: `5458474756078004d9dfcfd953371aed07ccc781810ff06aa9988b898268d249`
`font_01_sfnt_off00010818.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10818	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001202a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1202A	16740 bytes
SHA-256: `3b90e5ecddb014bf413b638c5c2a213408862d1f41a146606d21572a1ca025a4`

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